Timestamp Concurrency Control With SQLDataSource
Nov 10, 2005
I am trying to use a 'timestamp' type column with SQLDataSource for concurrency control with SQL Server. I'm getting the following error:
Operand type clash: timestamp is incompatible with sql_variant
It appears that the problem is that the value for the Type property of the Parameter (which was generated by the SqlDataSource wizard) is Object which maps to 'sql_variant' rather than to 'timestamp'.
I know that the older way of doing things with SqlDataAdapter, SqlCommand, SqlParameter can handle timestamps because SqlParameter has a SqlDbType property that can have a value of SqlDbType.Timestamp, but I don't see how to do this with the newer SqlDataSource, Parameter classes because the Parameter.Type property (of type TypeCode) doesn't have a Timestamp value.
Has anyone been able to use a 'timestamp' type field with SqlDataSource?
Here's my sample code:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="MyTestPage.aspx.cs" Inherits="MyTestPage" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" ><head runat="server"><title>Untitled Page</title></head><body><form id="form1" runat="server"><div><asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataSourceID="SqlDataSource1"EmptyDataText="There are no data records to display." DataKeyNames="MyID"><Columns><asp:CommandField ShowEditButton="True" /><asp:BoundField DataField="MyID" HeaderText="MyID" InsertVisible="False" ReadOnly="True"SortExpression="MyID" /><asp:BoundField DataField="MyDesc" HeaderText="MyDesc" SortExpression="MyDesc" /></Columns></asp:GridView><asp:SqlDataSource ID="SqlDataSource1" runat="server" ConflictDetection="CompareAllValues"ConnectionString="<%$ ConnectionStrings:CtrlConnectionString1 %>" DeleteCommand="DELETE FROM [MyTest] WHERE [MyID] = @original_MyID AND [MyDesc] = @original_MyDesc AND [timestamp] = @original_timestamp"InsertCommand="INSERT INTO [MyTest] ([MyDesc], [timestamp]) VALUES (@MyDesc, @timestamp)" OldValuesParameterFormatString="original_{0}"ProviderName="<%$ ConnectionStrings:CtrlConnectionString1.ProviderName %>" SelectCommand="SELECT [MyID], [MyDesc], [timestamp] FROM [MyTest]"UpdateCommand="UPDATE [MyTest] SET [MyDesc] = @MyDesc WHERE [MyID] = @original_MyID AND [MyDesc] = @original_MyDesc AND [timestamp] = @original_timestamp"><DeleteParameters><asp:Parameter Name="original_MyID" Type="Int32" /><asp:Parameter Name="original_MyDesc" Type="String" /><asp:Parameter Name="original_timestamp" Type="Object" /></DeleteParameters><UpdateParameters><asp:Parameter Name="MyDesc" Type="String" /><asp:Parameter Name="timestamp" Type="Object" /><asp:Parameter Name="original_MyID" Type="Int32" /><asp:Parameter Name="original_MyDesc" Type="String" /><asp:Parameter Name="original_timestamp" Type="Object" /></UpdateParameters><InsertParameters><asp:Parameter Name="MyDesc" Type="String" /><asp:Parameter Name="timestamp" Type="Object" /></InsertParameters></asp:SqlDataSource></div></form></body></html>
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Mar 20, 2006
Hi everyone!I've read a lot of document about optimistic concurrency and different implementations which made me decide to chose the timestamp/datetime approuch to validate if another user has editet the record.I'm saying timestamp OR datetime because I dont really care which one to use but I can't make any of them work as expected.Here is my setup:I'm using a DataSet (autogenerated by Visual Studio 2005) with 4 stored procedures to select, update, delete and insert records.I'm using a GridView to show these values but when using a timestamp in the database the parameter type in my ObjectDataSource is an Object which ofcause ins't right and I can't change it to Byte[].If I instead use a Datetime I believe that the date formatting is done somehow (even though i make the field ReadOnly in the GridView) - I can see the date is shown as: "01-01-1900 00:01:07" but the actually SQL that is executed is: 'Jan 1 1900 12:01:07:000AM' why this differense?So my question is which one should I use and how - the datetime/timestamp dosn't have to be shown - I would actually prefer that the datetime/timestamp was somehow hidden from the presentationlayer and only present in the data access layer but still would be transfered to and from the database when doing updates etc.Best of all I could use a working example.Thanks in advance :-)
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Apr 6, 2005
Hi! I'm building a web application with ASP.NET, and using MS SQL 2000 for my database server.
How should I do to guarantee the integrity of the data in spite of the concurrent access? Meaning... how can I make sure that more than 1 user can update 1 table at the same time, while no error will occur? Do I need to add some codes at my aspx file? Or do I need to do something to my database? Or do I not have to worry about it?
Thank you.
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Mar 5, 2008
I created an ETL Process which loads four different types of files into different tables in parallel. There is no issue with this parallelism as the sources and destinations are distinct. But I have a common log table where I log the status and timings of each load for any file type. When ever I start a new file load, I create an entry in this log table with the FileTypeID and LoadInProcess as 1 (this will be set to 0 for all other records of the same file type). At different stages of the load, I will pull the active LoadID of the current file type and update the same record with the timings and results. My code looks like this -
Code Snippet
SELECT
@LoadLogKey = LoadLogKey
FROM
SystemLoadLog (NOLOCK)
WHERE
FileTypeID = 1 and LoadInProcess = 1
IF @LoadLogKey is NULL
RAISERROR('Unable to retrive LoadLogKey for the current load!')
***Process1 Query
***Process2 Query
***Process3 Query
UPDATE
SystemLoadLog
SET
Process1Result = x,
Process2Result = y,
Process3Result =z
WHERE
LoadLogKey = @LoadLogKey
The first SELECT query is giving problems as different processes are using the same table to log the results and timings. The source files I load are too small that the data load finished in 1 or 2 seconds most of the time and within this timespan, I update the log atleast 10 times. So, if four different file types are loading, the hits to the SystemLoadLog can be as bad as 20 to 30 times in 1 second.
Can anyone let me know how to handle this?
Thanks in Advance!!!
Harish
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Jun 28, 2006
Hi,
I have a table X:
ID (PK, int, not null)
cstID(FK, int, not null)
Name( nvarchar(100),not null)
Desc( ntext, null)
I am using the table view in Enterprise manager, if I manually type in a new row, then I edit that row, setting "Desc" = NULL, then I delete that row (from within the table view) I get the error:
Data has changed since the results pane was last retrieved. Do you want to save your changes now? (Optimistic Concurrency Control Error)
Things to note:
There was a FTI on this table, I deleted it, didn't help.
No other process or users are editing/viewing this table
The error doesn't occur if edit any other column, just setting the "Desc" to NULL creates this error.
Some other tables in my DB exhibit this same behavior, but not all......I can't figure out what the heck is going on...can you?
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Apr 29, 2008
Hi folks, I am binding a gridview to a SQLDataSource that contains a timestamp column. My SQLDatasource contains an update method (via a stored procedure) that takes all of the data fields from the grid as input parameters. I am getting an error stating 'sql_variant is incompatible with timestamp' . The parameter definition for the update method specifies the timestamp column as type 'Object'. <UpdateParameters> <asp:Parameter Name="timestamp" Type="Object" /> ... </UpdateParameters> When the data is initially retrieved, the timestamp column is converted to a System.Byte[] however I cannot specify System.Byte[] in the parameter definition (different error) I have read other post with this issue but none seemed to have been solved (while still using SQLDataSource and binding).I have tried other datatypes and they do not work as well. Any help would be greatly appreciatedThanksTom
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Mar 28, 2006
Hello, I'm attempting to use the Sql Timestamp (Rowversion in 2005) datatype for optimistic concurrency for my SqlDataSource because the table I'm updating has a few columns that can be null which breaks the optimistic concurrency code generated by visual studio. However, the Type's available for SqlDataSource parameters do not include "Timestamp" and everything else I've tried throws exceptions. SO, is there anyway to use the timestamp/rowversion datatype with a SqlDataSource? Many thanks for your help, I have been googling this for literally hours. Thanks again.Drew
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Oct 23, 2007
please explain selectparameters and conflict detection property within sqldatasource control
mohsen
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May 6, 2008
hi friends,
I created sqldatasource control. In select command i written the query like this "select * form emp" and bounded in grid.How can I change the query for searching the details according the date wise when i click the search button.
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Jun 7, 2008
Hello experts
i have a SqlDataSource Control on my web form. Here is the source for the control
<asp:SqlDataSource ID="sqlSearchDataSource" runat="server" ConnectionString="<%$ ConnectionStrings:DbefomsConnectionString %>"
SelectCommand="SELECT [icon], [file_name], [path] FROM [tblfile] WHERE ([file_name] = @file_name)">
<SelectParameters>
<asp:ControlParameter ControlID="txtSearch" DefaultValue="0" Name="file_name" PropertyName="Text"
Type="String" />
</SelectParameters>
</asp:SqlDataSource>
This control displays icon, file_name, path in GridView Control
The problem is How can i store the above field values in an asp.net variable.
Thanks
Regards
Ali
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Dec 7, 2005
Do you have to use the sqldatasource in conjuction with another control like gridview or dropdown list?
I'd like to check to see if a record exists in one table before inserting data into another.
thanks
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Jan 31, 2006
Hello.I'm new to ASP.NET and trying to write data to a Microsft SQL Server. I have created a SqlDataSource control, which is 'connected' to my SQL server.Now my question is how i can put data in the database throw the control, and read data from it. I've read the site, but it's still unclear for me..Greetings!
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Aug 8, 2006
How do you set a timeout for an SqlDataSource control?
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Jan 16, 2007
Anyone can help me ?
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Jan 19, 2007
Hello:
I am having a little issue with an error that is frustrating me. I have a SqlDataSource within an asp:label control and also have a two dropdownlists inside that asp:label control also. When I select from the first dropdownlist, it should enable the second dropdownlist with the populated data, but instead I receive.
The SqlDataSource control 'sqlGetMLSByCity' does not have a naming container. Ensure that the control is added to the page before calling DataBind.
Any ideas why this would be? Here is the web from portion:
<asp:Label ID="recip_form_request" runat="server" Visible="false"> <ul> <li>Step one: Select listing type.</li> <li>Step two: Select the City that you are reciprocating to.</li> <li>Step three: Complete the Recip Form.</li> </ul> <asp:DropDownList ID="recip_form_type" runat="server" AutoPostBack="true" Visible="False"> <asp:ListItem Value="0" Text="(Select Form)"></asp:ListItem> <asp:ListItem Value="1" Text="Residential"></asp:ListItem> </asp:DropDownList> <br /> <asp:DropDownList ID="outside_assoc_cities" runat="server" AutoPostBack="True" Enabled="False" DataTextField="city" DataValueField="id" Visible="False"></asp:DropDownList><br /> <asp:Label ID="city_mls_desc" runat="server"></asp:Label><br /> <asp:Button ID="page1_btn" runat="server" Text="Next >>" Visible="False" /> <asp:SqlDataSource ID="sqlCities" runat="server" ProviderName="System.Data.SqlClient" ConnectionString="<%$ AppSettings:connectionstring %>" SelectCommandType="Text" SelectCommand="SELECT id, city FROM tCityMaster"></asp:SqlDataSource> <asp:SqlDataSource ID="sqlGetMLSByCity" runat="server" ProviderName="System.Data.SqlClient" ConnectionString="<%$ AppSettings:connectionstring %>"> <SelectParameters> <asp:ControlParameter ControlID="outside_assoc_cities" Name="City" /> </SelectParameters> </asp:SqlDataSource></asp:Label>
then the code behind:
Protected Sub outside_assoc_cities_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles outside_assoc_cities.SelectedIndexChanged If outside_assoc_cities.SelectedIndex > -1 Then Dim ItemId As Integer = Integer.Parse(outside_assoc_cities.SelectedValue) Dim MLSID As String = Nothing
Dim cmd As New SqlCommand Dim con As New SqlConnection cmd.Connection = con
Dim sqlGetMLSByCity_sql As SqlDataSource = CType(Page.FindControl("sqlGetMLSByCity"), SqlDataSource) 'using connectionstring from SqlDataSource Control con.ConnectionString = sqlGetMLSByCity_sql.ConnectionString 'con.ConnectionString = sqlGetMLSByCity.ConnectionString
cmd.CommandType = CommandType.Text cmd.CommandText = "SELECT mls_id FROM pwaordev..tCityMaster WITH(NOLOCK) WHERE ID=@ID"
cmd.Parameters.Add("@ID", SqlDbType.Int, 4).Value = ItemId
Try con.Open() MLSID = cmd.ExecuteScalar con.Dispose() cmd.Dispose() Catch ex As Exception con.Dispose() cmd.Dispose() Response.Write(ex.ToString()) End Try
'Further logic to display button depending on MLS If Not String.IsNullOrEmpty(MLSID) Then If MLSID = "B" Then city_mls_desc.Text = "The MLS system that covers " & outside_assoc_cities.SelectedItem.Text & " is Greater South Bay MLS." page1_btn.Visible = True ElseIf MLSID = "A" Then city_mls_desc.Text = "The MLS system that covers " & outside_assoc_cities.SelectedItem.Text & " is Big Bear BOR, MLS, which is not covered by Pacific West Association of REALTOR®, please contact us for more information." page1_btn.Visible = False ElseIf MLSID = "C" Then city_mls_desc.Text = "The MLS system that covers " & outside_assoc_cities.SelectedItem.Text & " is Combined L.A./Westside MLS." page1_btn.Visible = True ElseIf MLSID = "F" Then city_mls_desc.Text = "The MLS system that covers " & outside_assoc_cities.SelectedItem.Text & " is Crisnet MLS, which is not covered by Pacific West Association of REALTOR®, please contact us for more information." page1_btn.Visible = False ElseIf MLSID = "Y" Then city_mls_desc.Text = "The MLS system that covers " & outside_assoc_cities.SelectedItem.Text & " is DCAoR - Yucca Valley Area, which is not covered by Pacific West Association of REALTOR®, please contact us for more information." page1_btn.Visible = False ElseIf MLSID = "D" Then city_mls_desc.Text = "The MLS system that covers " & outside_assoc_cities.SelectedItem.Text & " is Desert Area MLS." page1_btn.Visible = True ElseIf MLSID = "L" Then city_mls_desc.Text = "The MLS system that covers " & outside_assoc_cities.SelectedItem.Text & " is i-Tech Glendale/Pasadena." page1_btn.Visible = True ElseIf MLSID = "M" Then city_mls_desc.Text = "The MLS system that covers " & outside_assoc_cities.SelectedItem.Text & " is MRM - Multi-Regional MLS." page1_btn.Visible = True ElseIf MLSID = "R" Then city_mls_desc.Text = "The MLS system that covers " & outside_assoc_cities.SelectedItem.Text & " is RIM - Rim of the World MLS, which is not covered by Pacific West Association of REALTOR®, please contact us for more information." page1_btn.Visible = False ElseIf MLSID = "G" Then city_mls_desc.Text = "The MLS system that covers " & outside_assoc_cities.SelectedItem.Text & " is SDI - San Diego, which is not covered by Pacific West Association of REALTOR®, please contact us for more information." page1_btn.Visible = False ElseIf MLSID = "S" Then city_mls_desc.Text = "The MLS system that covers " & outside_assoc_cities.SelectedItem.Text & " is SOCAL MLS - Southern California MLS." page1_btn.Visible = True ElseIf MLSID = "T" Then city_mls_desc.Text = "The MLS system that covers " & outside_assoc_cities.SelectedItem.Text & " is Outside Area, which is not covered by Pacific West Association of REALTOR®, please contact us for more information." page1_btn.Visible = False End If 'test.Text = MLSID 'If test.Text = "L" Then 'mls_text.Text = "i-Tech" 'End If End If End If End Sub
Any help would be great, thank you!
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Sep 20, 2007
I have an SqlDatSource that I have fully setup at design time, but I don't want it to open and load as soon as the page loads, instead I want to open it based on a condition.
How do you do that with a DataSource?
I know that I can simply remove the Select query, and then set it at run time, but I'm looking for something better, that allows me to have the Select query set at design time, in part because I have a lot of parameters.
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Sep 29, 2007
Hello:
I have two SqlDataSource controls on two different pages: one is updating a table and the other is reading from the same table.
Now is it possible that the reader SqlDataSource control can be refreshed immediately (to reflect updates) when the other control updates the table?
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Oct 15, 2007
Hello all,
I am trying to update the record which involed the modification of key in Datakeynames, but when i click the update button from gridview, it doesn't allow to change the value of modified column.
<asp:SqlDataSource ID="SqlDataSource1" runat="server" DataSourceMode="DataSet" ConnectionString="<%$ ConnectionStrings:WebsiteDataConnection %>" OldValuesParameterFormatString="old_{0}" SelectCommand="SELECT * FROM [ServiceAgents]" InsertCommand="INSERT INTO ServiceAgents VALUES(@Ser_STATE, @Ser_CITY, @Ser_AGENT, @Ser_PHONE, @Ser_EQUIPMENT)" UpdateCommand="UPDATE ServiceAgents SET AGENT=@AGENT, PHONE=@PHONE WHERE (STATE=@STATE and CITY=@CITY and AGENT=@old_AGENT and EQUIPMENT=@EQUIPMENT)" DeleteCommand="DELETE FROM ServiceAgents WHERE (STATE=@STATE and CITY=@CITY and AGENT=@AGENT and EQUIPMENT=@EQUIPMENT)" > <UpdateParameters> <asp:Parameter Type="String" Name="AGENT" /> <asp:Parameter Type="String" Name="PHONE" /> <asp:Parameter Name="old_AGENT" /> <asp:Parameter Type="String" Name="STATE" /> <asp:Parameter Type="String" Name="CITY" /> <asp:Parameter Type="String" Name="EQUIPMENT" /> </UpdateParameters> <InsertParameters> <asp:ControlParameter Name="Ser_STATE" ControlID="TextBox_state"/> <asp:ControlParameter Name="Ser_CITY" ControlID="TextBox_city"/> <asp:ControlParameter Name="Ser_AGENT" ControlID="TextBox_agent"/> <asp:ControlParameter Name="Ser_PHONE" ControlID="TextBox_phone"/> <asp:ControlParameter Name="Ser_EQUIPMENT" ControlID="TextBox_equip" /> </InsertParameters> <DeleteParameters> <asp:Parameter Type="String" Name="STATE" /> <asp:Parameter Type="String" Name="CITY" /> <asp:Parameter Type="String" Name="AGENT" /> <asp:Parameter Type="String" Name="EQUIPMENT" /> </DeleteParameters> </asp:SqlDataSource>
Does anyone got any ideas about it? Where is wrong in the control?
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Feb 16, 2008
I have a SQLDatasource control on a web page. It is the datasource for a gridview control.I want the gridview to show all jones if the FirstName textbox is left blank or empty. Right now I have to put a % in the FirstName textbox to get what I want. If I make the FirstNameTextBox empty or remove the % from the FirstNameTextbox it returns all the names in the database no matter what the last name is.How do I get it to work without having to use the % in the FirstName Textbox? THANKS!FilterExpression="LastName LIKE '%{0}%' and FirstName LIKE '%{1}%'"><FilterParameters> <asp:ControlParameter ControlID="LastNameTextBox" Name="LastName" PropertyName="Text" DefaultValue="" /> <asp:ControlParameter ControlID="FirstNameTextBox" Name="FirstName" PropertyName="Text" DefaultValue="" /></FilterParameters>
Last Name: Jones___________First Name: %_____________FILTERBUTTON
GridviewLast Name First NameBob JonesBill Jones
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Apr 8, 2008
I have not found anything useful on the Wizard control. Anything I can find gets to the last step and then just takes the info you supplied and applies them to a bunch of Label.Text's - none that do work.
So I am building a Wizard control for an HR system that will insert the information into SQL through a SqlDataSource. The problem is, only the controls that are present in whichever step is currently selected in VWD will appear in the Command and Parameter Editor.
I tried to work around it by selecting the first step, then applying the controls in step 1 within the Parameter Editor, but when I go back to do step 2, it erases everything I just did for step 1.
How do I implement the Wizard with a SqlDataSource?
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Jun 2, 2008
I have a gridview that is tied to a SQLDataSource control. As the gridview is filled some of the ASPX code calls some code in the code behind page. Where I am having trouble is that in one of these calls I need to some how pass the id filed ("LISTID")of the table for the SQL statement in the code behind page and I'm not sure how to do it.
The code behind function is always using the same id and I do not know how to change it. Below is all the code.
Here is the calling code in the ASPX page.
"DeleteBtn" Visible='<%# IsDeleteBtnVisible %>' runat="server" CausesValidation="False" CommandName="Delete" Text="Delete" ForeColor="#003399"> Here is the entire ASPX code. class="header"> class="title">My Lists "Span1"> Current List Filter: "DropDownList2" cssclass="filterdropdown" AutoPostBack="true" runat="server"> "Active" Value="False"> "Done" Value="true"> --------------------------------------------------------------------------------"separator2"/> "list2"> "ScriptManager1" EnablePartialRendering="true" runat="server"> "Up2" UpdateMode="Conditional" runat="server"> "GridView1" runat="server" AutoGenerateColumns="False" DataKeyNames="LISTID" DataSourceID="SqlDataSource1" AllowPaging="True" AllowSorting="True" EnableViewState="False" GridLines="None" AlternatingRowStyle-BackColor="#FFFFCC" AlternatingRowStyle-Font-Size="Small" ForeColor="#FFFFCC" Font-Size="Small" AlternatingRowStyle-ForeColor="Black" Width="100%" HeaderStyle-ForeColor="White"> "False"> "LinkButton1" runat="server" CausesValidation="True" CommandName="Update" Text="Update" ForeColor="#003399"> "LinkButton2" runat="server" CausesValidation="False" CommandName="Cancel" Text="Cancel" ForeColor="#003399"> "LinkButton1" runat="server" CausesValidation="False" CommandName="Edit" Text="Edit" ForeColor="#003399"> "DeleteBtn" Visible='<%# IsDeleteBtnVisible %>' runat="server" CausesValidation="False" CommandName="Delete" Text="Delete" ForeColor="#003399"> "buttons"> "commands"> "ITEM_DETAILS" HeaderText="Details" SortExpression="ITEM_DETAILS" ControlStyle-ForeColor="#003399"> "name_edit"> "name"> "name"> "Pri" itemStyle-HorizontalAlign="Center" SortExpression="Priority" ControlStyle-ForeColor="#003399"> "DropDownList1" Width="75" SelectedValue='<%# Bind("Priority") %>' runat="server"> "High" Value="3"> "Medium" Value="2"> "Low" Value="1"> "pri" Text='<%# FormatPriority(Eval("Priority")) %>' runat="server"> "priority"> "#003399"> "priority"> "DUEDATE" itemStyle-HorizontalAlign="Center" HeaderText="Due Date" DataFormatString="{0:MM/dd/yyyy}" SortExpression="DUEDATE" >
"Center">
"COMPLETEDON" itemStyle-HorizontalAlign="Center" HeaderText="Completed On" DataFormatString="{0:MM/dd/yyyy}" SortExpression="COMPLETEDON" >
"Center">
"Done" itemStyle-HorizontalAlign="Center" SortExpression="IsComplete"> "CheckBox1" runat="server" Checked='<%# Bind("IsComplete") %>'> "iscomplete"> "iscomplete"> "Done" Text='<%# FormatDone(Eval("IsComplete")) %>' runat="server">
"Button2" runat="server" CommandName="Something" DataTextField="LISTID" DataTextFormatString="{0} active items" text='<%# Eval("LISTID") %>'> "Empty">No lists "White"> "#FFFFCC" Font-Size="Small" ForeColor="Black"> "Div1"> "Up3" UpdateMode="Conditional" runat="server"> Add New List: "AddItem2" cssclass="newitem" runat="server"> "Button1" runat="server" OnClick="AddListBtn_Click" Text="Add"> "txtdate" runat="server"> "Button1" EventName="Click"> "SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:FastTrackConnectionString %>" SelectCommand="SELECT * FROM [TODO]"> Here is the code behind page code. Protected Function IsDeleteBtnVisible() As Boolean ' Return IIf(itemCount = 0, True, False)
'This is for my gridview Dim strConn2 As SqlConnection = New SqlConnection Dim cmd2 As SqlCommand = New SqlCommand Dim rs2 As SqlDataReader Dim test1 As String Dim test2 As String
strConn2.ConnectionString = System.Configuration.ConfigurationManager.ConnectionStrings("FastTrackConnectionString2").ToString() strConn2.Open()
cmd2.Connection = strConn2 cmd2.CommandText = "SELECT LISTID, (SELECT COUNT(0) AS ItemCount FROM TODO_SUB_ITEMS WHERE(LISTID = TODO.LISTID) AND (ISCOMPLETE ='False')) AS ItemCount FROM TODO WHERE (ISCOMPLETE ='False')"
rs2 = cmd2.ExecuteReader()
rs2.Read()
Dim testlistid As Integer = rs2(0) Dim intholder As Integer = rs2(1)
strConn2.Close() cmd2 = Nothing strConn2 = Nothing
Return IIf(intholder = 0, True, False)
End Function
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Jun 4, 2008
I have a gridview that is filled from a SQLDataSource control when the page loads.
I need to do some updates and delets on this data and I wanted to know can you add more than one SQL statement to a SQLDataSource control or do I have to have a seprate control for each operation?
The SQL currently is just the standard SELECT *, I cannnot see a way to add statments.
Thanks,
Ty
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Jun 11, 2008
There is something I don't understand or I am just missing something here.
Why is it that I can place an SqlDataSource1.Insert() or update, or delete, but not an SqlDataSource.Select() inside a button click event "for an example" without getting an Compilation Error?
Thanks,
xyz789
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Feb 1, 2006
I have dragged 3 SqlDataSource Controls to the WebDesigner and none are appearing graphically in the Designer View, but they are in the Source View. How can I get the control to appear in the designer.
Thanks,
Mark
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Feb 26, 2006
When I configure a SQLDataSource control I want the following where clause...
WHERE (RegionID = @RegionID AND DistrictID IS NULL AND CampusID IS NULL) OR (DistrictID = @DistrictID AND CampusID IS NULL ) OR(CampusID = @CampusID AND UserRole = 'CampusAdmin') OR (CampusID = @CampusID)but it gets reformated as....
WHERE (RegionID = 'Region10') AND (DistrictID IS NULL) AND (CampusID IS NULL) OR (DistrictID = 2) AND (CampusID IS NULL) OR (CampusID = '999999103') AND (UserRole = 'CampusAdmin') OR (CampusID = '999999103')I don't think these are functionaly equivelant, are they?If not how do I stop the 'wizard' from reformatting the SQL where clause?Thanks
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Oct 6, 2006
I set up a Sqldatasource control in 2.0 and I can retrieve data through a SQL Server connection from a stored procedure. My problem is when I set up the insert command object through the wizard for the Sqldatasource control with another stored procedure for inserting data and call the insert method of my Sqldatasource object i get nothing not even an error it just goes through the code like nothing was wrong and I don't get anything inserted. I don't know if this could be a problem but one of the parameters in the stored procedure is declared like this: @return tinyint output. I don't know how the Sqldatasource accounts for return parameters. Here is the code for the insert for the Sqldatasource object.<asp:SqlDataSource ID="sdsMain" runat="server" ConnectionString="<%$ ConnectionStrings:SN_CUSTOMERConnectionString %>"InsertCommand="uspSNOrder_Promo_Live" InsertCommandType="StoredProcedure" SelectCommand="uspOPFillPromo"SelectCommandType="StoredProcedure"><InsertParameters><asp:ControlParameter ControlID="ddlPromo" Name="promoid" PropertyName="SelectedValue"Type="Int32" /><asp:Parameter DefaultValue="1" Name="datasourceid" Type="Int32" /><asp:Parameter DefaultValue="0" Name="datasourcekey" Type="String" /><asp:Parameter DefaultValue="9" Name="salesroomid" Type="Int32" /><asp:Parameter DefaultValue="9999" Name="userid" Type="Int32" /><asp:ControlParameter ControlID="txtFName" DefaultValue="" Name="firstname" PropertyName="Text"Type="String" /><asp:ControlParameter ControlID="txtLName" Name="lastname" PropertyName="Text" Type="String" /><asp:ControlParameter ControlID="txtAddress" Name="address" PropertyName="Text" Type="String" /><asp:ControlParameter ControlID="txtCity" Name="city" PropertyName="Text" Type="String" /><asp:ControlParameter ControlID="txtState" Name="state" PropertyName="Text" Type="String" /><asp:ControlParameter ControlID="txtZip" Name="zip" PropertyName="Text" Type="String" /><asp:ControlParameter ControlID="txtPhone" Name="phone" PropertyName="Text" Type="String" /><asp:ControlParameter ControlID="txtEmail" Name="email" PropertyName="Text" Type="String" /><asp:ControlParameter ControlID="ddlStatus" Name="status" PropertyName="SelectedValue"Type="Int32" /><asp:Parameter DefaultValue="0" Direction="InputOutput" Name="return" Type="Byte" /></InsertParameters></asp:SqlDataSource>Thanks in advance
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Apr 2, 2007
Dear all,I am couping a dropdownlist and a sqldatasource control to display a column from a database of SQL/Server on browser. However, when I tried to configure the sqldatasource to let it get data from SQL/Server, it always report an error. It normally happens at the first step of creating new connection. After I specified the correct sql/server instance name, using SQL server authentication, and select a database name. Even the connection test can sucessfully passed. However, when I click the "OK" button, an error message saying "object reference not set to an instance of an object" popped out and I could not add new connections. The strange thing is that after I reintall the visual studio 2005 service pack 1. It will function properly for a while. After sometime, it will fail again. Anybody has suggestions? Thanks a lot!
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Jun 10, 2007
I have made a SQLDataSource control with the select command:
SELECT COUNT(*) AS 'Antall' FROM Utgivelse WHERE (medieID = @medieID)
I want to use the "Antall" result programmatically in C# code. I try the following statement: IDataReader MyReader;
MyReader = CType(SqlDataSource2.Select(DataSourceSelectArguments.Empty),IDataReader);
but it doesnot work. Can somebody help me how to get the data from th control ?
Tom
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May 28, 2008
Is it possible to place a stored procedure in a SQLDataSource control that needs a variable input then run it later?
DETAILS
I have 2 pages with gridview controls that are linked to a SQLDataSource controls.
What I would like to do is when the user clicks on a link in the gridview of the first page I want to take the value of the link clicked and pass it to the second page where it is placed into a variable that would be used in a WHERE clause to fill the second pages gridview.
I have no problem getting the value into a variable in the page load event of the second page. What I would be nice is since the gridview is already tied to a SQLDataSource control with the columns specified is if I could some how pass the variable to a stored procedure in the control so I don't have to manually pull and fill the data.
Any thoughts would be apperciated.
Thanks,
Ty
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Nov 12, 2005
how can i display the result of an asp:SqlDataSource into a lable control.the sqldatasource returns the count for some thing ie "select count(*) as total from tbl"please help
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Nov 17, 2005
Hi,I would like to upload images using an SQLDataSource Control with a DetailsView, so that users can update/insert/delete records.Can someone tell me how I can do this in VB.NET ?It seems that I'm the only one on the world trying to do this already with ASP.NET VWD 2005.Thanks to all....Bart
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Jan 5, 2006
After some help from the folks in the Security forum, I have some of the answer I need. Hopefully someone here can help me figure out the best method of using that information to find a final solution.
To start, here's a brief synapsis: I'm developing an App in ASP.NET 2.0, using forms-based authentication and the Login Control. I am able to login fine as far as I can tell, since I am able to proceed to the destinationURL without error. From there, I button click to the application in question. Here is where I have the problem.
I want to run a select query on a SQL table where a field = the current user's Username. I cannot find any examples of doing this. I have managed to figure out how to retrieve the current user's username via the Membership.GetUser method, but I can't seem to figure out how to apply that to my SqlDataSource Control and get a valid response.
a snippet of my control's code follows:
<script runat="server"> - This is run inline, not code-behindProtected memUser As MembershipUser
Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)memUser = Membership.GetUser()End Sub</script>
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:SWGToolsetConnectionString %>"SelectCommand="SELECT [CharacterName] FROM [Characters] WHERE ([UserID] = '<% =Server.HtmlEncode(memUser.Username) %>')"></asp:SqlDataSource>
If anyone can tell me what I can or should be doing differently, I would appreciate it.
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Aug 19, 2006
hi,
i need to code for retrieving single data from sqldatasource control. i need the full set of coding
connecting
retrieving data in text box
editing data to the table
updating data to the table
deleting data to the table
i want to fetch "single field data"
any one who know the code please post reply or send it to my mail senthilonline_foryou@rediffmail.com
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