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ASP.NET SQL Query example

Posted on 2010-08-23
6
641 Views
Last Modified: 2013-11-27
I aplogize, I did not know exactly what I needed to post.  I saw this article which looks like what I'm trying to do:
http://www.mikesdotnetting.com/Article/64/Bind-Data-From-a-SqlDataSource-to-a-Label
I created a database.mdf with a table "Employees" with 3 columns, FirstName, LastName and EmployeeID

I copied this text into a Default.aspx Page:

<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default.aspx.vb" Inherits="_Default" %>

<!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></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    <asp:Label ID="Label1" runat="server" /> <asp:Label ID="Label2" runat="server" />


  <asp:SqlDataSource
ID="SqlDataSource1"
runat="server"
ConnectionString="<%$ ConnectionStrings:DatabaseConnectionString2 %>"
ProviderName="<%$ ConnectionStrings:DatabaseConnectionString2.ProviderName %>"
SelectCommand="SELECT [LastName], [FirstName] FROM [Employees] WHERE ([EmployeeID] = ?)"
OnSelecting="SqlDataSource1_Selecting">
</asp:SqlDataSource>
 
  <asp:SqlDataSource
ID="SqlDataSource2"
runat="server"
ConnectionString="<%$ ConnectionStrings:DatabaseConnectionString3 %>"
ProviderName="<%$ ConnectionStrings:DatabaseConnectionString3.ProviderName %>"
DatasourceMode="DataReader"
SelectCommand="SELECT [LastName], [FirstName] FROM [Employees] WHERE ([EmployeeID] = ?)"
OnSelecting="SqlDataSource2_Selecting">
</asp:SqlDataSource>

    </div>
    </form>
</body>
</html>


I copied this code into the default.aspx.vb page:

Imports System.Data
Imports System.Data.OleDb

Partial Class _Default
    Inherits System.Web.UI.Page

    Protected Sub SqlDataSource1_Selecting(ByVal sender As Object,
      ByVal e As SqlDataSourceSelectingEventArgs)
        e.Command.Parameters("EmployeeID").Value = 2
    End Sub
    Protected Sub SqlDataSource2_Selecting(ByVal sender As Object,
      ByVal e As SqlDataSourceSelectingEventArgs)
        e.Command.Parameters("EmployeeID").Value = 2
    End Sub

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        Dim dvSql As DataView =
   DirectCast(SqlDataSource1.Select(DataSourceSelectArguments.Empty), DataView)
        For Each drvSql As DataRowView In dvSql
            Label1.Text = drvSql("FirstName").ToString()
        Next

        Dim rdrSql As OleDbDataReader =
         DirectCast(SqlDataSource2.Select(DataSourceSelectArguments.Empty), OleDbDataReader)
        While rdrSql.Read()

            Label2.Text = rdrSql("LastName").ToString()
        End While
        rdrSql.Close()
    End Sub

End Class


I get this error message:

System.IndexOutOfRangeException was unhandled by user code
  Message=An SqlParameter with ParameterName 'EmployeeID' is not contained by this SqlParameterCollection.
  Source=System.Data
  StackTrace:
       at System.Data.SqlClient.SqlParameterCollection.GetParameter(String parameterName)
       at System.Data.Common.DbParameterCollection.get_Item(String parameterName)
       at _Default.SqlDataSource1_Selecting(Object sender, SqlDataSourceSelectingEventArgs e) in E:\WebSites\Simple SQL table lookup\Default.aspx.vb:line 9
       at System.Web.UI.WebControls.SqlDataSourceView.OnSelecting(SqlDataSourceSelectingEventArgs e)
       at System.Web.UI.WebControls.SqlDataSourceView.ExecuteSelect(DataSourceSelectArguments arguments)
       at System.Web.UI.WebControls.SqlDataSource.Select(DataSourceSelectArguments arguments)
       at _Default.Page_Load(Object sender, EventArgs e) in E:\WebSites\Simple SQL table lookup\Default.aspx.vb:line 17
       at System.Web.UI.Control.OnLoad(EventArgs e)
       at System.Web.UI.Control.LoadRecursive()
       at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
  InnerException:

I know I'm doing something really dumb.  Can anyone please help?  Thanks
0
Comment
Question by:Bocefus
6 Comments
 
LVL 21

Expert Comment

by:chapmanjw
ID: 33507767
You have not specified where the EmployeeID parameter is coming from.  Here is sample code from Microsoft that shows you how to specify the parameters: http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.sqldatasource.selectparameters.aspx
0
 
LVL 14

Expert Comment

by:Dhanasekaran Sengodan
ID: 33507996
0
 
LVL 7

Expert Comment

by:kovilpattiBalu
ID: 33521532
hi,

In your select querys include "EmployeeID" as parameter.
Ie: SqlCommand cmdInsert = new SqlCommand(sqlInsert, sqlConnection);
cmdInsert.Parameters.Add("@EmployeeID", SqlDbType.NVarChar, 20, "EmployeeID");
0
 

Author Comment

by:Bocefus
ID: 33536893
kovilpattiBalu
Where would I add this?  
 
0
 
LVL 21

Accepted Solution

by:
chapmanjw earned 500 total points
ID: 33537539
In between the  and  tags you would add a
 tag.  For examples, see: http://msdn.microsoft.com/en-us/library/z72eefad.aspx
0

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