FilterExpression
Jun 6, 2008
I have a CheckBoxList which is bound to a SQLDataSource and populated with a list of courses. Under this I have a calendar control which is bound to another SQLDataSource control. When the page is first loaded this is empty because no courses are selected. I'd like it so that the user can select one or more course from the CheckBoxList and the appropraite events are loaded into the calendar control bound to the second SQLDataSource. I've tried using FilterExpression but this seems to work on the basis of a complete resultset being loaded and then filtered-out using the FilterExpression. I'm starting with no records and would like to Filter-In data from the database.
Is this possible using FilterExpression?
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Aug 25, 2006
I am new to ASP. I am trying to use "Filterexpression".
FilterExpression="(Address_no >= '@Startno') AND (Address_no <= '@Endno')" >
I could not get it work. Could someone help me? Here is my code.
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<%@ Page Language="VB" AutoEventWireup="false" CodeFile="FarmedStreet.aspx.vb" Inherits="FarmedStreet" %>
<!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="gvFarm" runat="server" AllowPaging="True" AllowSorting="True" AutoGenerateColumns="False"
BackColor="#DEBA84" BorderColor="#DEBA84" BorderStyle="None" BorderWidth="1px"
CellPadding="3" CellSpacing="2" DataKeyNames="StreetID" DataSourceID="dsfarm"
Font-Bold="False" Font-Names="Arial" Font-Size="11pt" PageSize="5">
<FooterStyle BackColor="#F7DFB5" ForeColor="#8C4510" />
<Columns>
<asp:CommandField ShowSelectButton="True">
<ItemStyle ForeColor="#00C000" />
</asp:CommandField>
<asp:BoundField DataField="StreetID" HeaderText="ID" InsertVisible="False" ReadOnly="True"
SortExpression="StreetID" />
<asp:BoundField DataField="StartNo" HeaderText="StartNo" SortExpression="StartNo" />
<asp:BoundField DataField="EndNo" HeaderText="Endno" SortExpression="EndNo" />
<asp:BoundField DataField="Street" HeaderText="Street" SortExpression="Street" />
<asp:BoundField DataField="Zip" HeaderText="Zip" ReadOnly="True" SortExpression="Zip" />
<asp:CheckBoxField DataField="IsFarming" HeaderText="?" SortExpression="IsFarming" />
<asp:CommandField ShowEditButton="True">
<ItemStyle ForeColor="#00C000" />
</asp:CommandField>
</Columns>
<RowStyle BackColor="#FFF7E7" ForeColor="#8C4510" />
<SelectedRowStyle BackColor="#738A9C" Font-Bold="True" ForeColor="White" />
<PagerStyle ForeColor="#8C4510" HorizontalAlign="Center" />
<HeaderStyle BackColor="#A55129" Font-Bold="True" ForeColor="White" />
</asp:GridView>
<asp:SqlDataSource ID="dsfarm" runat="server" ConnectionString="<%$ ConnectionStrings:cnFarming %>"
SelectCommand="SELECT __Street.StreetID, __Street.Street, __Street.ZipID, __Street.IsFarming, __Street.StartNo, __Street.EndNo, __Zip.Zip FROM __Street INNER JOIN __Zip ON __Street.ZipID = __Zip.ZipID WHERE (NOT (__Street.StartNo IS NULL)) AND (NOT (__Street.EndNo IS NULL))">
</asp:SqlDataSource>
<asp:Button ID="btnResident" runat="server" BackColor="#00C000" Enabled="False" Font-Bold="True"
ForeColor="Yellow" Text="Resident" />
</div>
<asp:SqlDataSource ID="dsResidentA" runat="server" ConnectionString="<%$ ConnectionStrings:cnFarming %>"
SelectCommand="SELECT ProspectID, FName, LName, SAddress, SCity, SState, SZip, MAddress, MCity, MState, MZip, Bed, Bath, [S FT], phone, City, Address_no, Street, CatID, PropID, StreetID, ZipID, Apt FROM __Prospect WHERE (StreetID = @StreetID)"
FilterExpression="(Address_no >= '@Startno') AND (Address_no <= '@Endno')" >
<SelectParameters>
<asp:ControlParameter ControlID="gvFarm" Name="StreetID" PropertyName="SelectedValue" />
<asp:ControlParameter ControlID="gvFarm" Name="Startno" PropertyName="SelectedValue" />
<asp:ControlParameter ControlID="gvFarm" Name="Endno" PropertyName="SelectedValue" />
</SelectParameters>
</asp:SqlDataSource>
<asp:GridView ID="GridView1" runat="server" AllowPaging="True" AllowSorting="True"
AutoGenerateColumns="False" DataSourceID="dsResidentA" PageSize="5">
<Columns>
<asp:BoundField DataField="ProspectID" HeaderText="ProspectID" InsertVisible="False"
SortExpression="ProspectID" />
<asp:BoundField DataField="FName" HeaderText="FName" SortExpression="FName" />
<asp:BoundField DataField="LName" HeaderText="LName" SortExpression="LName" />
<asp:BoundField DataField="Address_no" HeaderText="Address_no" SortExpression="Address_no" />
<asp:BoundField DataField="Apt" HeaderText="Apt" SortExpression="Apt" />
<asp:BoundField DataField="PropID" HeaderText="PropID" SortExpression="PropID" />
</Columns>
</asp:GridView>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
</form>
</body>
</html>
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Aug 4, 2006
I have a some search components to filter a GridView follows:
<asp:DropDownList ID="ddFilterType" runat="server" ToolTip="Select field to search"> <asp:ListItem Selected="True">(ALL)</asp:ListItem> <asp:ListItem>SKU</asp:ListItem> <asp:ListItem>Vendor Name</asp:ListItem> <asp:ListItem>Item Name</asp:ListItem></asp:DropDownList><asp:TextBox ID="txtSearchFilter" runat="server"></asp:TextBox><asp:LinkButton ID="btnSearchFilter" runat="server">Filter</asp:LinkButton>
and C# code as follows:
protected void Page_Load(object sender, EventArgs e){ if (IsPostBack) { if (ddFilterType.SelectedValue != "ALL") { dsItems.FilterExpression = (ddFilterType.SelectedValue = txtSearchFilter.Text); gvItems.DataBind(); } else { gvItems.DataBind(); } }}
But when I run the search, I get:Exception Details: System.Data.EvaluateException: Cannot find column [the value in txtSearchFilter.Text].
How should I do my C# syntax to get this to work? Also, I would like to add further logic to check if the field is not the SKU field and have my expression do a LIKE expression instead of checking for equality. Any help with this is much appreciated.
Marc
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Feb 5, 2007
Hi
on my page: two sqldatasources one has the sqlexperession:
SELECT DISTINCT [Skil] FROM [UsersView]UNIONSELECT 'Alles'
the other one :
SELECT [UserName], [Afdeling], [Skil], [RoepNaam] FROM [UsersView]
the first source is bound to a dropdown list. witch I want to use for filtering.
the second to a gridview.
the code for the dropdownlist selectedindexchanged is:protected void SkillDDL_SelectedIndexChanged(object sender, EventArgs e)
{
if (SkillDDL.SelectedValue.ToString() == "Alles")
{
SqlDataSource3.FilterExpression = "";
}
else
{
SqlDataSource3.FilterExpression = "Skil = '" + SkillDDL.SelectedValue + "'";
}
}
The strange thing is that initially 'Alles' is selected in the dropdown list and I see all the records. then I select an other value in the dropdownlist. and I get the filtered records, like I would expect.
then when I select 'Alles' again I keep my last selected records in view. I would expect that the filter is now an empty string and I would get all the records again. what do I do wrong?
thanks
Rob Warning
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May 31, 2007
I have a filter expression and I have 2 data types one is an int and the other is a date format. I want to setup 2 textboxes to search for either the int or the date. I have the FilterExpression setup as follows:
FilterExpression="PROJECT_CODE = '{0}' or PROJECT_DATE L= '{0}'"<FilterParameters>
<asp:ControlParameter ControlID="TextBoxProjectCode" Name="PROJECT_CODE" PropertyName="Text" Type="Int16" />
<asp:ControlParameter ControlID="TextBoxProjectDate" Name="PROJECT_DATE" PropertyName="Text" /></FilterParameters>
I can take out one or the other and run the search and return results, but can not do it with both. Is there a way to do this and what do I need to do to make it work?
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Nov 12, 2007
Hi. I want to use a FilterExpression in my sqldatasource that verify if a value is in a listbox with several values. How can I do that? Thanks
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Feb 21, 2007
I'm not sure exactly how the FilterExpression works. I have a sqldatasource, stored procedure, and GridView. My stored procedure basicly a select statement to populate my gridview, it included the fields I want to filter on. In my codebehind file I build a WHERE Clause based on the entries a user makes. Then I add the my FilterExpr variable to the SqlDataSource1.FilterExpression = FilterExpr. My SqlDataSource has a number of control parameters that match the textboxes a users enters into.
My question, I guess is does my stored procedure need the variables matching my controlparameters for my sqldatasource? Or how does this work? My GridView is returning all rows no matter what I enter into the filter textboxes (first, last, etc...)
MY SQLSDATASOURCE <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:ConnectionString %>"
SelectCommand="ClientSearch" SelectCommandType="StoredProcedure">
<FilterParameters>
<asp:ControlParameter ControlID="SearchLastName" Name="LastName" PropertyName="Text" ConvertEmptyStringToNull="true" />
<asp:ControlParameter ControlID="SearchFirstName" Name="FirstName" PropertyName="Text" ConvertEmptyStringToNull="true" />
<asp:ControlParameter ControlID="SearchEmail" Name="Email" PropertyName="Text" ConvertEmptyStringToNull="true" />
<asp:ControlParameter ControlID="SearchAddress" Name="Address" PropertyName="Text" ConvertEmptyStringToNull="true" />
<asp:ControlParameter ControlID="SearchComment" Name="Comment" PropertyName="Text" ConvertEmptyStringToNull="true" />
</FilterParameters>
</asp:SqlDataSource>MY CODEBEHIND Dim FilterExpr As String If SearchLastName.Text = "" And _ SearchFirstName.Text = "" And _ SearchEmail.Text = "" And _ SearchComment.Text = "" And _ SearchAddress.Text = "" Then lblMessage.Text = "You didn't enter any search parameters. Please try Again." Me.GridViewSearch.DataSourceID = "" Exit Sub Else Me.GridViewSearch.DataSourceID = "SqlDataSource1" End If FilterExpr = "" If SearchLastName.Text <> "" Then FilterExpr = FilterExpr & "LastName Like '" & _ SearchLastName.Text & "%" & "' AND " End If If SearchFirstName.Text <> "" Then FilterExpr = FilterExpr & "FirstName Like '" & _ SearchFirstName.Text & "%" & "' AND " End If If SearchEmail.Text <> "" Then FilterExpr = FilterExpr & " Like '" & _ SearchEmail.Text & "%" & "' AND " End If If SearchComment.Text <> "" Then FilterExpr = FilterExpr & "[Comments] Like '" & "%" & _ SearchComment.Text & "%" & "' AND " End If If SearchAddress.Text <> "" Then FilterExpr = FilterExpr & "[Address] Like '" & "%" & _ SearchAddress.Text & "%" & "' AND " End If If Right(FilterExpr, 4) = "AND " Then FilterExpr = Left(FilterExpr, Len(FilterExpr) - 4) End If Try Me.SqlDataSource1.FilterExpression = FilterExpr Me.SqlDataSource1.DataBind() Me.GridViewSearch.DataBind() Me.lblMessage.Text = Me.SqlDataSource1.FilterExpression Catch objException As SqlException Dim objError As SqlError For Each objError In objException.Errors Response.Write(objError.Message) Next End Try End Sub
MY SPROCGO
ALTER PROCEDURE [dbo].[ClientSearch]
AS
SELECT C.ClientID, C.FirstName, C.LastName, A.Address,
C.Comments, C.EMail
FROM tblClient C INNER JOIN
tblClientAddresses A ON C.ClientID = A.ClientID
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May 31, 2007
This is what I have:
<asp:TextBox ID="TextBoxProjectCode" runat="server"></asp:TextBox>
<asp:Button ID="ButtonSearch" runat="server" Text="Search" /> <br>
<asp:TextBox ID="TextBoxProjectDate" runat="server" ></asp:TextBox>
<asp:Button ID="ButtonSearch" runat="server" Text="Search" />
SelectCommand="SELECT CLIENT_NAME, CLIENT_CODE, PROJECT_CODE, PROJECT_NAME, PROJECT_DESCRIPTION, EMPLOYEE_ID, ENTRY_DATE, ENTRY_TIME, ENTRY_DESCRIPTION, COMBINED_CODE, TIME_ENTRY_ID, BILLABLE FROM VIEW_TIME WHERE (EMPLOYEE_ID = @SELECT_EMPLOYEE_ID) ORDER BY ENTRY_DATE DESC" FilterExpression="PROJECT_CODE = '{0}' or ENTRY_DATE = '#{0}#' "
<FilterParameters>
<asp:ControlParameter ControlID="TextBoxProjectCode" Name="PROJECT_CODE" PropertyName="Text" Type="Int32" />
<asp:ControlParameter ControlID="TextBoxProjectDate" Name="ENTRY_DATE" PropertyName="Text" Type="DateTime" /></FilterParameters>
Why do I keep getting errors. What am I missing?
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Oct 1, 2007
I am trying to filter some results using the FilterExpression Property of the SqlDataSource. I have multiple drop down lists with different filtering options. I am trying to change the filter that is applied to a gridview.
Something like this example... http://blogs.vbcity.com/mcintyre/archive/2006/08/17.aspx
Here is some of my code..Private Sub ApplyFilter()
Dim _filterExpression As String = ""
If (Not DropDownList1.SelectedIndex = 0) And (DropDownList2.SelectedIndex = 0) And (DropDownList3.SelectedIndex = 0) Then
_filterExpression = "CategoryName = '{0}'"
End If Me.SqlDataSource1.FilterExpression = _filterExpression
End Sub
Protected Sub DropDownList1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles DropDownList1.SelectedIndexChanged
ApplyFilter()
End Sub
But this doesn't seem to work. The FilterExpression doesn't keep the value. I am looking for a way to dynamically change the FilterExpression. Any Ideas or Suggestions?? Thanks.
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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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Mar 25, 2008
Hi.
Is there a way to convert a smalldatetime value to a year value (1/1/2001 -> 2001) in this case?
I tried year(thisIsSmalldatetimeField) and datepart(yyyy, thisIsSmalldatetimeField)
Dim FilterExpression As String = String.Concat("thisIsSmalldatetimeField=" & DropDownList.SelectedValue & "")
mySqlDataSource.FilterParameters.Clear()
mySqlDataSource.FilterExpression = FilterExpression
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Jun 12, 2007
Hello,
I have a Repeater control getting data from a SqlDataSource.The SqlDataSource uses a stored procedure which accepts a input parameter with the name "sort" (@sort).
How do I use the FilterExpression with FilterParameter for defining the input value for the stored procedure ?The input value comes from an asp:QueryStringParameter.Or can the FilterExpression only be used with SQL Statements defined directly (as for defining the where clause) ?
I guess the best way is to use the FilterExpression soo the data is cached in the Dataset which is needed/required when using FilterExpression.Alternativly I could use the SelectParameter instead FilterParameters, but I guess the data wont be cached then.Anyone who can help me and guide me in the right direction ?
Best regardsMartin
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Aug 31, 2007
How does one programmatically retrieve the results from a sqldatasource that has had a filterexpression applied to it?
Let me elaborate, here is my code:
SqlDataSource1.FilterExpression = "MenuType = 'myfilteredvalue'"
Dim _dv As DataView = CType(SqlDataSource1.Select(DataSourceSelectArguments.Empty), System.Data.DataView)
_dv.Table.TableName = "Menu" Dim ds As New DataSet("Menus") ds.Tables.Add(_dv.Table.Copy()) 'Add relation: ParentID under MenuID
Dim relation As New DataRelation("ParentChild", ds.Tables!Menu.Columns!MenuID, ds.Tables!Menu.Columns!ParentID, True) relation.Nested = True
ds.Relations.Add(relation)
What I'm doing is, I have a sqlDataSource that pulls all the data from my DB. With this data in the sqlDataSourceSource, I want to then populate an XMLDatasource (via a dataset) with only the records I need, i.e. the filter. However, after I apply my filter above, the sqlDataSoruce still contains all the records. I thought maybe if I did a sqlDataSource.Bind() after my SqlDataSource.FilterExpression, but that didn't do anything either.In laymans terms:I want to say something like: dataset = sqldatasource.filter(my filter expression).
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Mar 18, 2008
I am using the FilterExpression of an SqlDataSource object to filter the rows of a gridview. It works with searching text values but I cannot for the life of me figure out to get it to work with dates. The following is what I do for character searches: SomeDataSource.FilterExpression = fieldToSearch + " LIKE '%" + SearchTextBox.Text + "%'"; This works. However when I try to search for dates using the following it doesn't work (startDate and endDate are DateTime objects):SomeDataSource.FilterExpression = fieldToSearch + " BETWEEN #" + startDate.ToString("yyyy-MM-dd") + "# AND #" + endDate.ToString("yyyy-MM-dd") + "#";// or
SomeDataSource.FilterExpression = fieldToSearch + " = #" + startDate.ToString("yyyy-MM-dd") + "#";// or
SomeDataSource.FilterExpression = fieldToSearch + " = #'" + startDate.ToString("MM/dd/yyyy HH:mm:ss") + "'#";
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Apr 14, 2008
I have wrote some codes as follows:
Dim sqldatasource3 As New SqlDataSource sqldatasource3.ConnectionString = System.Web.Configuration.WebConfigurationManager.ConnectionStrings("aspnetConnectionString").ConnectionString sqldatasource3.SelectCommand = "select stepno,steppersontype,stepname,steptype,fchoice,fforward,schoice,sforward from flow " sqldatasource3.FilterExpression = "stepname = '" & GridView1.SelectedRow.Cells(4).Text.Trim & "'" sqldatasource3.DataSourceMode = SqlDataSourceMode.DataSet Dim dv As DataView = sqldatasource3.Select(DataSourceSelectArguments.Empty()) dv.RowFilter = "stepname = '" & GridView1.SelectedRow.Cells(4).Text.Trim & "'"
but i found the filterexpression didn't work. No matter what value GridView1.SelectedRow.Cells(4).Text.Trim be,sqldatasource always return the whole dataset.I wanna know where these code are wrong? Can anyone help?
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Apr 25, 2008
I facing a problem when i want to modified the sqldatasource.filterExpression while trigger sqldatasource.selecting event. 1 Protected Sub SqlDsProduct_Selecting(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.SqlDataSourceSelectingEventArgs)
2 Dim SqlDsProduct As SqlDataSource = CType(CompleteGridView1.DetailRows(0).FindControl("SqlDsProduct"), SqlDataSource)
3 SqlDsProduct.FilterExpression = Session("filter") ' filter i add up after user press search button
4 End subActually i'm using the CompleteGridview, which i downloaded from the web. the "SqlDsProduct" i reffering to is inside the CompleteGridView1. I'm using complet grid view because i want the hierarchy look for the gridview. So please help me how i gonna change the filter expression of the 2nd sqldatasource inside detailsTemplate of the completeGridview. Thank you. best regardvince
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