I'm reading XML data into a DataTable that is populated into a datagrid. From here I need to update database and wanted to know how to Fill a DATA ADAPTER with a DATA TABLE?
I'm familiar with updating using a SQL command, but in this case, i have the dataTable already created from XML.
Please help.
Thanks,
For some reason I've had trouble with this today... can anyone provide me with a generic code snippet that programatically allows me to select data from a database limited by a parameter and then fills a datatable?
View 4 Replies View Relatedi have this code :
if(! IsPostBack)
{
string strConnection = "server=localhost; uid=sa;
pwd=sasasa; database=northwind";
string strCommand = "Select * from Customers";
SqlDataAdapter dataAdapter = new
SqlDataAdapter(strCommand, strConnection);
DataSet dataset = new DataSet();
dataAdapter.Fill(dataset, "Products");
SqlCommandBuilder bldr = new
SqlCommandBuilder(dataAdapter);
DataTable dataTable = dataset.Tables[0];
dgCustomer.DataSource = dataTable;
dgCustomer.DataBind();
}
when i run this code, error like this appear :
Server Error in '/Registeration' Application.
SQL Server does not exist or access denied. Description:
An unhandled exception occurred during the execution of the current web
request. Please review the stack trace for more information about the error and
where it originated in the code. Exception Details:
System.Data.SqlClient.SqlException: SQL Server does not exist or access
denied.Source Error:
Line 41: DataSet dataset = new DataSet();Line 42: Line 43: dataAdapter.Fill(dataset, "Products");Line 44: SqlCommandBuilder bldr = new SqlCommandBuilder(dataAdapter);Line 45: Source File:
e:asp.net
egisteration
egister.aspx.cs Line: 43
Stack Trace:
[SqlException: SQL Server does not exist or access denied.] System.Data.SqlClient.ConnectionPool.GetConnection(Boolean& isInTransaction) System.Data.SqlClient.SqlConnectionPoolManager.GetPooledConnection(SqlConnectionString options, Boolean& isInTransaction) System.Data.SqlClient.SqlConnection.Open() System.Data.Common.DbDataAdapter.QuietOpen(IDbConnection connection, ConnectionState& originalState) System.Data.Common.DbDataAdapter.FillFromCommand(Object data, Int32 startRecord, Int32 maxRecords, String srcTable, IDbCommand command, CommandBehavior behavior) System.Data.Common.DbDataAdapter.Fill(DataSet dataSet, Int32 startRecord, Int32 maxRecords, String srcTable, IDbCommand command, CommandBehavior behavior) System.Data.Common.DbDataAdapter.Fill(DataSet dataSet, String srcTable) Registeration.WebForm1.Page_Load(Object sender, EventArgs e) in e:asp.net
egisteration
egister.aspx.cs:43 System.Web.UI.Control.OnLoad(EventArgs e) System.Web.UI.Control.LoadRecursive() System.Web.UI.Page.ProcessRequestMain()
Version Information: Microsoft .NET Framework Version:1.1.4322.573;
ASP.NET Version:1.1.4322.573
how can i solve this problem??? thank you...
i have this code :
private void Page_Load(object sender, ....)
{
if(! IsPostBack)
{
string strConnection = "server=localhost; uid=sa;
pwd=**secret**; database=northwind";
string strCommand = "Select * from Customers";
SqlDataAdapter dataAdapter = new
SqlDataAdapter(strCommand, strConnection);
DataSet dataset = new DataSet();
dataAdapter.Fill(dataset, "Products");
SqlCommandBuilder bldr = new
SqlCommandBuilder(dataAdapter);
DataTable dataTable = dataset.Tables[0];
dgCustomer.DataSource = dataTable;
dgCustomer.DataBind();
}
}
when i run this code, error like this appear :
Server Error in '/Registeration' Application.
SQL Server does not exist or access denied. Description:
An unhandled exception occurred during the execution of the current web
request. Please review the stack trace for more information about the error and
where it originated in the code. Exception Details:
System.Data.SqlClient.SqlException: SQL Server does not exist or access
denied.Source Error:
Line 41: DataSet dataset = new DataSet();Line 42: Line 43: dataAdapter.Fill(dataset, "Products");Line 44: SqlCommandBuilder bldr = new SqlCommandBuilder(dataAdapter);Line 45: Source File:
e:asp.net
egisteration
egister.aspx.cs Line: 43
Stack Trace:
[SqlException: SQL Server does not exist or access denied.] System.Data.SqlClient.ConnectionPool.GetConnection(Boolean& isInTransaction) System.Data.SqlClient.SqlConnectionPoolManager.GetPooledConnection(SqlConnectionString options, Boolean& isInTransaction) System.Data.SqlClient.SqlConnection.Open() System.Data.Common.DbDataAdapter.QuietOpen(IDbConnection connection, ConnectionState& originalState) System.Data.Common.DbDataAdapter.FillFromCommand(Object data, Int32 startRecord, Int32 maxRecords, String srcTable, IDbCommand command, CommandBehavior behavior) System.Data.Common.DbDataAdapter.Fill(DataSet dataSet, Int32 startRecord, Int32 maxRecords, String srcTable, IDbCommand command, CommandBehavior behavior) System.Data.Common.DbDataAdapter.Fill(DataSet dataSet, String srcTable) Registeration.WebForm1.Page_Load(Object sender, EventArgs e) in e:asp.net
egisteration
egister.aspx.cs:43 System.Web.UI.Control.OnLoad(EventArgs e) System.Web.UI.Control.LoadRecursive() System.Web.UI.Page.ProcessRequestMain()
Version Information: Microsoft .NET Framework Version:1.1.4322.573;
ASP.NET Version:1.1.4322.573
how can i solve this problem??? thank you...
Filling a DataTable from SqlQuery : If SqlQuery returns some null values problem ocurrs with DataTable.
Is it possible using DataTable with some null values in it?
Thanks
Hi, What is the difference b/w sqldatareader and sqldataadapter? For what purpose are they used in a database connection & how do they differ from each other? Pls explain me in detail.Regards Vijay.
View 1 Replies View RelatedWhy DataAdapter does NOT load relations from DB ?the relations are made using SQL SERVER MANAGEMENTbut when a fill a datatable using dataadapter the relations are not loaded .why ? what is the solution to this problem ?
View 1 Replies View RelatedHi i'm a new to ASP.NET and for some reason when i click the Next button in the code below, the pageIndex does not change. Please assist, Basically what i'm trying to do is to use DataAdapter.fill but passing in the start index and the number of records to pull from the dataset table.
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.OleDb;
public partial class Home : System.Web.UI.Page
{
//ConnectionOleDbConnection dbConn;
//discount that can be change by user using a gui interface
//CurrentPageint pageIndex = 0;double discount = 0.15 ;
protected void Page_Load(object sender, EventArgs e)
{
// homeGridView.Visible = true;
BindList();
}protected string getSpecial(string price,object sale)
{String special = "";if (sale.ToString().CompareTo("True") == 0)
{special = String.Format("{0:C}",double.Parse(price) * (1-discount));
}return special;
}
protected void BindList()
{
//Creating an object for the 'PagedDataSource' for holding the data.
//PagedDataSource objPage = new PagedDataSource();
try
{
//open connection
openConnection();
//sql commandstring columns = "*";
string SqlCommand = "Select " + columns + " from Books";
//create adapters and DataSetOleDbDataAdapter myAdapter = new OleDbDataAdapter(SqlCommand, dbConn);DataSet ds = new DataSet("bSet");
//create tableDataTable dt = new DataTable("Books");myAdapter.Fill(ds, pageIndex, 9, "Books");
Response.Write("Page Index: "+pageIndex);
//create table data viewDataView dv = new DataView(ds.Tables["bTable"]);
booksDataList.DataSource = ds;
booksDataList.DataBind();
myAdapter.Dispose();
dbConn.Close();
}catch (Exception ex)
{
Response.Write("Exception thrown in BindList()");
dbConn.Close();throw ex;
}
}
public void openConnection()
{string provider="Microsoft.Jet.OLEDB.4.0";
string dataSource = "C:/Documents and Settings/Owner/My Documents/Visual Studio 2005/WebSites/E-BookOnline/App_Data/BooksDB.mdb";dbConn = new OleDbConnection("Provider =" + provider + ";" + "Data Source =" + dataSource);
dbConn.Open();
}protected void nextClick(object sender, EventArgs e)
{
pageIndex=pageIndex+1;Response.Write("In nextClick"+pageIndex);
BindList();
}protected void prevClick(object sender, EventArgs e)
{if (pageIndex > 0)
{
pageIndex=pageIndex-1;
BindList();
}
}
}
I have done some reading on the dataadapter class, but do not have a good handle on how to work with dataadapter after it has been filled by a dataset. For instance, should I use an if statement such as this to update the value in the dataadapter? if (dsSunbelt.Tables[0].Columns[39].Equals("")) { DataRow drUpdate = dsSunbelt.Tables[0].Columns[39].Equals(DateTime.Now); } I am sure it is not hard to see what I am doing, and I hope that I am missing something small, but how do I isolate a dataadapter value to update in the corresponding database?
View 2 Replies View RelatedHi, I am populating a datagrid with data from one sql table, I add additional columns and then wish to write it back out to another table. I have written the following code to acheive this, however it keeps throwing the follwing exception - "Update requites a valid UpdateComman when passed a DataRow collection with modified rows"
I've looked and I can see what the problem is, can anybody help please?
Private Sub FillData()
'SQL connection
Me.sqlconnection = New System.Data.SqlClient.SqlConnection
Me.sqlconnection.ConnectionString = ConfigurationSettings.AppSettings("CuroConnection")
Dim sql As String
If Request("action") = "gen" Then
sql = "select item from tblPickList where GroupName = 'xxx'AND Category = '" & Category2 & "' ORDER BY item ASC"
ElseIf Request("action") = "fav" Then
sql = "select identifiertext as item from tblfavourites where HRID = " & Session("hrid") & " and type = 3 ORDER BY identifiertext ASC"
ElseIf Request("action") = "spec" Then
sql = "select item from tblPickList where GroupName = '" & GroupID & "' AND Category = '" & Category2 & "' ORDER BY item ASC"
End If
ds = New DataSet
da = New SqlClient.SqlDataAdapter(sql, sqlconnection)
Try
sqlconnection.Open()
da.Fill(ds, "tblPickListTemp")
sqlconnection.Close()
Catch ex As Exception
sqlconnection.Close()
End Try
ds.Tables(0).Columns.Add("HRID")
ds.Tables(0).Columns.Add("Flag")
'may possibly add a favourites column here at a later date to ensure no duplication
Dim dr As DataRow
For Each dr In ds.Tables("tblPickListTemp").Rows
dr("HRID") = Session("hrid")
dr("Flag") = 0
Next
DgrdFavourites.DataSource = ds
DgrdFavourites.DataBind()
End Sub
Public Sub CreateTempRecords()
'SQL connection
Me.sqlconnection = New System.Data.SqlClient.SqlConnection
Me.sqlcommand = New System.Data.SqlClient.SqlCommand
Me.da = New SqlClient.SqlDataAdapter
Me.sqlconnection.ConnectionString = ConfigurationSettings.AppSettings("CuroConnection")
Dim sql As String
sql = "Insert into tblPickListTemp (Item, HRID, Flag) values (@Item, @HRID, @Flag)"
sqlcommand.CommandText = sql
sqlcommand.Connection = sqlconnection
sqlcommand.Parameters.Add("@Item", "Item")
sqlcommand.Parameters.Add("@HRID", "HRID")
sqlcommand.Parameters.Add("@Flag", "Flag")
da.InsertCommand = sqlcommand
da.Update(ds.Tables(0))
End Sub
hi
this is probably a piece of pie to fix but i be having some problems......
i have this peice of code to update the sql dataapadapter
Dstest1.Tables("test").Rows(0)("hello") = Me.textboxhello.Text
SqlDataAdapter1.Update(Dstest1, "test")
this does not work, it does work however if i replace the Me.textboxhello.Text
with a value in quotation marks or with another text box not linked to that feild in the table... it does not work with the relevant text box!!!!!!!!
thanks for all your help
cq
Hy, again! I am at the begining of an application. I have some modules that insert, delete and update only one row at one table. My question is should I use dataadapter.Update() or ExecuteNonQuery(). I prefer ExecuteNonQuery because I want to build a class : DataLayer to implement my own InsertProcedure(), UpdateProcedure(),DeleteProcedure(). I want speed in my application, so which is the best: dataadapter.Update() OR ExecuteNonQuery(). Thank you!
View 5 Replies View Related
Good day,
I just like to ask if anybody has experienced getting empty rows from SQL data adapter? I'm using SQL Server 2005. Problem is when the sql is run on Query Analyzer it retrieves a number of rows but when used in my application it returns 0 or empty rows.
I thought the connection is not the problem since I got my columns right. Below is my code snippet.
Thanks!
const string COMMAND_TEXT = @"select distinct somefield as matchcode, count(somefield) "
+ "as recordcount from filteredaccount where StateCode = 0 group by somefield having count(somefield) > 1";
SqlDataAdapter adapter = new SqlDataAdapter(COMMAND_TEXT, connection);
DataTable dt = new DataTable(sometablename);
adapter.Fill(dt);
I am having trouble getting an Update call to actually update records. The select statement is a stored procedure which is uses inner joins to link to property tables. The update, insert, and delete commands were generated by Visual Studio and only affect the primary table. So, to provide a simple example, I have a customer table with UID, Name, and LanguageID and a seperate table with LanguageID and LanguageDescription. The stored procedure can be used to populate a datagrid with all results (this works). The stored procedure also populates an edit page with one UID (this works). After the edit is completed, I attempt to update the dataset, which only has one row at this time, which shows that it has been modified. The Update modifies 0 rows and raises no exceptions. Is this because the update, insert, and delete statements do not match up one-to-one with the dataset? If so, what are my choices?
View 1 Replies View RelatedHi,
I'm using DataAdapter.Update() to update data in a table. My question is; how do I create a trigger that works after the update has completely finished?
For example if my update adds 50 new rows to a table the trigger I've currently got fires after each new row that is added ie 50 times in total. Is it possible to get it to trigger after the last (ie 50th) row is added???
Thanks
hi friends,
i look forward an answer that solves my problem.
iam trying too populate a DropDown list . here is the codings. Previously it was working. suddenly,
it s generating error.
strConnectionString = "Provider = SQLOLEDB;Integrated Security=False; User ID=sa;Password=;Data Source=GIREESH-AC720F7;Initial Catalog=NorthWind"
in page_load event
dim sql as string
sql = "select AthleteNameKey from athletes"
result_adap = DbAccess.ExecuteAdaP(sql)
result_adap.Fill(result_ds, "athletes")
cboAthleteName.DataSource = "athletes"
cboAthleteName.DataTextField = "AthleteNameKey"
cboAthleteName.DataValueField = "AthleteNameKey"
cboAthleteName.DataBind()
Public Function ExecuteAdaP(ByVal sqls As String) As OleDbDataAdapter
'Dim ds As New OleDbDataAdapter
Dim da As New OleDbDataAdapter(sqls, strConnectionString)
'da.Fill(ds)
Return da
End Function
Hi,
I am trying to use DataAdapter.Update to save a file stream into SQl Express.
I have a dialog box that lets user select the file:
openFileDialog1.ShowDialog();
I want to put
openFileDialog1.OpenFile();
Into
this.documentTableAdapter.Update(this.docControllerAlphaDBDataSet.Document.DocumentColumn);
I am thinking that it might just be some syntax issue, but I looked online, and didn't find much answers.
Thanks,
Ke
Hi!
I am trying to insert data into 2 different tables. I am using dataadapter and dataset.
Protected Sub SubmitButton_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles SubmitButton.Click
Call ConnectionString()
Dim insertSQL As New SqlCommand()
insertSQL.Connection = sqlConn
insertSQL.CommandText = "SELECT location.CountryName, location.CityName, location.BuildingName, location.FloorID, rooms.name, rooms.FloorID AS Expr1 FROM location INNER JOIN floors ON location.FloorID = floors.id INNER JOIN rooms ON floors.id = rooms.FloorID"
Dim ds As New DataSet()
Dim da As New SqlDataAdapter()
da.SelectCommand = insertSQL
Dim scb As New SqlCommandBuilder(da)
Try
da.Fill(ds)
Dim ndr = ds.Tables("location").NewRow
Dim ndr2 = ds.Tables("rooms").NewRow
ndr("FloorID") = FloorIDDDL.SelectedValue
ndr("CountryName") = CountryNameTextBox.Text
ndr("CityName") = CityNameTextBox.Text
ndr("BuildingName") = BuildingNameTextBox.Text
ndr2("name") = RoomNameTextBox.Text
ndr2("FloorID") = FloorIDDDL.SelectedValue
ds.Tables("location").Rows.Add(ndr)
ds.Tables("room").Rows.Add(ndr2)
da.Update(ds)
ErrMsgLbl.Text = "Information saved successfully"
Catch ex As Exception
ErrMsgLbl.Text = ex.ToString
End Try
sqlConn.Close()
End Sub
The above code does not throw any error. It also does not update the tables.
Your help will be appreciated.
Thanks!
I'm using DataList to return vales stored in an SQL database, of which one of the fields contains the date the record was added.
I am trying to fill the dataset with items only from the last 30 days.
I've tried a few different ways, but all the database rows are returned.
What is the WHERE clause I sholud use to do this??
Thanks
I am reading multiple databases into a single dataset, putting each read into a new datatable in the set. Ultimately, I want to merge the multiple tables (they are all from different DB tables in different locations using the same schema). I am also combining this with data from an Oracle database which is in yet another table in the same dataset.
Here is my question:
I will not be propagating any changes to this data back to its original source, but I will be populating it out to Active Directory. (Don't worry; I'm not asking any AD questions here.) But I do want to run SELECT, DELETE, and UPDATE queries against the data in the dataset in memory without writing it out to a separate file. Based on that type of usage, would I be better to use a DataReader or a DataAdapter to do the read from the original database? If I use a DataReader, can I still update the data in memory? In either case, what's the correct methodology to update data in a dataset in memory?
Thanks!
My DataAdapter.Update() Method is running this query against my database and all the parameters and the formatting looks correct to me. I was wondering if anyone could identify obvious errors.... Thanks!
exec sp_executesql
N'NewUpdateCommand',
N'@Name nvarchar(50),
@PriContactFName nvarchar(50),
@PriContactLName nvarchar(50),
@PriContactWork nvarchar(20),
@PriContactFax nvarchar(20),
@PriContactCell nvarchar(20),
@PriContactEmail nvarchar(50),
@MainOfficeLocationAddr1 nvarchar(50),
@MainOfficeLocationAddr2 nvarchar(50),
@MainOfficeLocationCity nvarchar(50),
@MainOfficeLocationState nvarchar(50),
@MainOfficeLocationZip nvarchar(15),
@Description nvarchar(50),
@Original_ClientID int,
@ClientID int',
@Name=N'Brinker International',
@PriContactFName=N'Steves',
@PriContactLName=N'Maubley',
@PriContactWork=N'913-876-9876',
@PriContactFax=N'913-098-8765',
@PriContactCell=N'913-987-7654',
@PriContactEmail=N'a@b.c',
@MainOfficeLocationAddr1=N'1234 Burkwood',
@MainOfficeLocationAddr2=NULL,
@MainOfficeLocationCity=N'Tallahassee',
@MainOfficeLocationState=N'Florida',
@MainOfficeLocationZip=N'99111',
@Description=N'This is a good client.',
@Original_ClientID=1,
@ClientID=1
Msg 102, Level 15, State 1, Line 15
Incorrect syntax near 'NewUpdateCommand'.
My task is to bind and show 3 different values coming from three different queries into three different columns of GridView. I had done this as mention in below. Program was successful. But I want to excute these three queries in same Stored Procedure. I can do that and stored in seperated variables. I need help how to call these three different values in data adapters and store each value in three different columns of grid view.
Simply I want to below statement in stored procedures and call from program. Can any one help me plz.
con = DataBaseConnection.GetConnection();
DataSet ds = new DataSet();
SqlDataAdapter da = new SqlDataAdapter("select isnull(sum(PA_DAmt),0) from PA_Deposits where PA_UID = @PA_UID", con);
da.SelectCommand.Parameters.Add("@PA_UID", SqlDbType.Int).Value = Convert.ToInt32(Session["PA_UID"]);
da.Fill(ds,"Dep");
SqlDataAdapter da1 = new SqlDataAdapter("select isnull(sum(PA_EAmt),0) from PA_Expenses where PA_UID = @PA_UID", con);
da1.SelectCommand.Parameters.Add("@PA_UID", SqlDbType.Int).Value = Convert.ToInt32(Session["PA_UID"]);
da1.Fill(ds,"Exp");
SqlDataAdapter da2 = new SqlDataAdapter("select isnull(sum(PA_IAmt),0) from PA_Income where PA_UID = @PA_UID", con);
da2.SelectCommand.Parameters.Add("@PA_UID", SqlDbType.Int).Value = Convert.ToInt32(Session["PA_UID"]);
da2.Fill(ds,"Inc");
string deposits = Convert.ToString(ds.Tables["Dep"].Rows[0].ItemArray[0]);
string expenses = Convert.ToString(ds.Tables["Exp"].Rows[0].ItemArray[0]);
string income = Convert.ToString(ds.Tables["Inc"].Rows[0].ItemArray[0]);
GridView1.DataSource = ds;
GridView1.DataBind();
GridView1.Rows[0].Cells[0].Text = "Total";
GridView1.Rows[0].Cells[1].Text = deposits
GridView1.Rows[0].Cells[2].Text = expenses;
GridView1.Rows[0].Cells[3].Text = income;
//The above program was success.
// This is another way I had tried. But failed. I am getting Index out of bound error. Can any solve this if possible to u.
SqlCommand cmd = new SqlCommand("select isnull(sum(PA_DAmt),0) from PA_Deposits where PA_UID = @PA_UID", con);
cmd.Parameters.Add("@PA_UID", SqlDbType.Int).Value = (int)Session["PA_UID"];
GridView1.Rows[0].Cells[1].Text = cmd.ExecuteScalar().ToString();
cmd.CommandText = "select isnull(sum(PA_EAmt),0) from PA_Expenses where PA_UID = @PA_UID";
GridView1.Rows[0].Cells[2].Text = cmd.ExecuteScalar().ToString();
cmd.CommandText = "select isnull(sum(PA_IAmt),0) from PA_Income where PA_UID = @PA_UID";
GridView1.Rows[0].Cells[3].Text = cmd.ExecuteScalar().ToString();
ASPX Code for Grid View
<h2>Account Summary</h2><br />
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" emptydatatext="There are no data records to display." Width="238px" >
<Columns>
<asp:TemplateField >
<ItemTemplate>
<asp:Label ID="Label1" runat="server" Text="Total"></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField ><%--HeaderText="Deposits"--%>
<ItemTemplate>
</ItemTemplate>
<HeaderTemplate>
<a href="Deposits.aspx" >Deposits</a>
</HeaderTemplate>
<ItemStyle HorizontalAlign="Center" />
</asp:TemplateField>
<asp:TemplateField >
<HeaderTemplate>
<a href="Expenses.aspx">Expenses</a>
</HeaderTemplate>
<ItemStyle HorizontalAlign="Center" />
<ItemTemplate>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField >
<HeaderTemplate>
<a href="Income.aspx">Income</a>
</HeaderTemplate>
<ItemStyle HorizontalAlign="Center" />
<ItemTemplate>
<%-- <%# Eval("Course") %>--%>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
Plz solve this.
Hi I am trying to use the results of a datatable as an input to a ne SQL statement.
The datatable is created and populted by the source below after previously creating MyLookupCommand
MyLookupReader = MyLookupCommand.ExecuteReader(CommandBehavior.CloseConnection)
Dim Mydatatable = New DataTable()
Mydatatable.Load(MyLookupReader)
I now create a new SQL string allong the lines of
SELECT tableA.field1 FROM TableA INNERJOIN Mydatatable ON tableA.field2 = Mydatatable.Filed9
However I get the following error
Invalid object name 'Mydatatable'.
Any suggestions on how to resolve this.
possibley of interest is that I would have like to have done this in 1 SQL but the results in Mydatatable are from a SELECT DISTINCT and Field1 is a text filed that can't be used in a DISTINCT statement, hence using two statements.
Many thanks in advance
Hi,
I'm wondering if this is possible. I want to use a datatable as a parameter in my SQL query. The error I am getting is "No mapping exists from object type System.Data.DataColumn to a known managed provider native type." Any help is appreciated.
Here is the code.
Private Function GetAvailableTutors(ByVal qualifiedTutorsDataSet As DataTable) As DataTable
Dim TutorAvailabilityDataTable As DataTable = New DataTable()
Using myConnection As New SqlConnection(ConfigurationManager.ConnectionStrings("ASC_Schedule").ConnectionString)
Dim myCommand As SqlCommand = _
New SqlCommand("SELECT TutorID, TimeIndex FROM T_Hours WHERE SessionID > 0 AND TutorID IN (@TutorList) AND DateDropped > GetDATE() ORDER By T_QualifiedTutors.TutorID", myConnection)
myCommand.Parameters.AddWithValue("@TutorList", qualifiedTutorsDataSet.Columns.Item("TutorID"))
Dim myDataAdapter3 As SqlDataAdapter = New SqlDataAdapter()
myDataAdapter3.SelectCommand = myCommand
myDataAdapter3.Fill(TutorAvailabilityDataTable)
Return TutorAvailabilityDataTable
End Using
End Function
hi all
the usual way to bid a gridview is to data soursce
is there a way to do the folowing , creat a data table from the gridview shown valus " currunt page "
thanks
Hi,
I am experimenting to make a datatable in C# code in a page. This table should be a disconected table with Only valid for the present session.
I try the following code:
public partial class Default2 : System.Web.UI.Page
{
DataTable DT = new DataTable("TEST");
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
DataColumn Col1 = new DataColumn("Col1");
Col1.DataType = typeof(Int32);
Col1.AllowDBNull = false;
DT.Columns.Add(Col1);
DataColumn Col2 = new DataColumn("Col2");
Col2.DataType = typeof(string);
Col2.AllowDBNull = true;
DT.Columns.Add(Col2);
DataColumn Col3 = new DataColumn("Col3");
Col3.DataType = typeof(DateTime);
Col3.AllowDBNull = true;
DT.Columns.Add(Col3);
GridView1.DataSource = DT;
}
}
protected void Button1_Click(object sender, EventArgs e)
{
for (int i = 1; i < 20; i++)
{
DataRow MyRow = DT.NewRow();
MyRow["Col1"] = i;
DT.Rows.Add(MyRow);
}
}
}
For one reason or the other. if I click the button I get the message that Col1 dus not make part of the table TEST. It turns out that there are no columns added to the table. altroug the code in the page load part has been run. I suppose I have to do something with the session state to make my DataTable persistent, but I have no idea what. Can somebody help me out?
Thanks!
Rob
Is the merge method, what will work in this case ? I have two datatables with the exact same structure. How can I append the rows from table 2 onto the bottom of table 1 ? Is looping through the rows collection the only way ?
View 2 Replies View RelatedHi,Is it possible to store data that is retrieved by SqlDataSource in a... let's say... DataTable? I mean, If I dragged and dropped a GridView and an SqlDataSource and then I set up those controls in page designer in Visual Studio, is it possible at some time later to retrieve the data retrieved by the SqlDataSource and then store the data in a DataTable?Best regards,Haris
View 7 Replies View RelatedIs there a built in way of converting a LINQ qurey result into a DataTable or DataView ?
View 4 Replies View Relatedhai This is rameshi had a small doubt in this public DataTable GetStatelist() { DataTable returnValue = null; SqlCommand selcommand = new SqlCommand(); selcommand.CommandType = CommandType.Text; selcommand.CommandText = "select * from USER_MASTER"; selcommand.Connection = _connectionobject; try { _connectionobject.Open(); DataSet ds = new DataSet(); SqlDataAdapter ada = new SqlDataAdapter(selcommand); ada.Fill(ds); _connectionobject.Close(); return returnValue; ; } catch (Exception exception) { if (_connectionobject.State == ConnectionState.Open) { _connectionobject.Close(); } throw new Exception(exception.Message); } if (_connectionobject.State == ConnectionState.Open) { _connectionobject.Close(); } return returnValue; ; } after compiling its show the return value is nullwhat is error in my codinghow i can return the value to the corresponding function if (!IsPostBack) { GridView1.DataSource=database.GetStatelist(); GridView1.DataBind(); } i am waiting for the result
View 4 Replies View RelatedI am fetching records from a table and putting in a datatable using the "sqlda.fill(datatable)"
when i see the datable in "data visualizer" i find no rows.
It is confused eventhough it does not throw any error
Do I have to save the datatable into sqldatasource's SELECT results? if yes , how?
View 4 Replies View RelatedI have a table containing prices. This table will be queried very often to provide quotes for clients.So to ease the burden on the server I want to cache the table and then just query the cached version.However it seems that I can only cache the table as a datatable. This means I have to query the datatable to get the prices for each quote.I'm not sure how to query a datatable. Is ther syntax similar to querying a SQL table?In fact is this best way to go about things?Any help would be appreciated.G
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