SqlDataSourceView.SelectCommand Property

Gets or sets the SQL string that the SqlDataSourceView object uses to retrieve data from the underlying database.

Namespace: System.Web.UI.WebControls
Assembly: System.Web (in system.web.dll)

public:
property String^ SelectCommand {
	String^ get ();
	void set (String^ value);
}
/** @property */
public String get_SelectCommand ()

/** @property */
public void set_SelectCommand (String value)

public function get SelectCommand () : String

public function set SelectCommand (value : String)

Not applicable.

Property Value

An SQL string that the SqlDataSourceView uses to retrieve data.

Because different database products use different varieties of SQL, the syntax of the SQL string depends on the current ADO.NET provider being used, which is identified by the ProviderName property. If the SQL string is a parameterized query or command, the placeholder of the parameter also depends on the ADO.NET provider being used. For example, if the provider is the System.Data.SqlClient, which is the default provider for the SqlDataSource class, the placeholder of the parameter is '@parameterName'. However, if the provider is set to the System.Data.Odbc or System.Data.OleDb, the placeholder of the parameter is '?'. For more information on parameterized SQL queries and commands, see Parameters with the SqlDataSource and AccessDataSource Controls.

The SelectCommand property can be an SQL string or the name of a stored procedure, if the data source supports stored procedures.

Security noteSecurity Note:

It is more secure to use a stored procedure than a SQL statement for the SelectCommand property.

The value of the SelectCommand property is stored in view state.

This section contains two code examples. The first code example demonstrates how to set the SelectCommand text to a basic SQL query to retrieve data from a Microsoft SQL Server database and display it in a DropDownList control. The second code example demonstrates how to set the SelectCommand text to the name of a stored procedure to retrieve data from a SQL Server database and display it in a DropDownList.

The following code example demonstrates how to set the SelectCommand text to a basic SQL query to retrieve data from a SQL Server database and display it in a DropDownList control. The Button and TextBox controls are provided as a simple interface to update the address for the selected user in the DropDownList.

No code example is currently available or this language may not be supported.
<%@Page  Language="VJ#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">
 private void On_Click(Object source, System.EventArgs e)
 {
    try {
       SqlDataSource1.Update();
    }
    catch (Exception except) {
        // Handle the Exception.
    }
    Label2.set_Text("The record was updated successfully!");
 } //On_Click
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>ASP.NET Example</title>
</head>
<body>
    <form id="form1" runat="server">
      <asp:SqlDataSource
          id="SqlDataSource1"
          runat="server"
          ConnectionString="Data Source=localhost;Integrated Security=SSPI;Initial Catalog=Northwind;"
          SelectCommand="SELECT EmployeeID, LastName, Address FROM Employees"
          UpdateCommand="UPDATE Employees SET Address=@Address WHERE EmployeeID=@EmployeeID">
          <UpdateParameters>
              <asp:ControlParameter Name="Address" ControlId="TextBox1" PropertyName="Text"/>
              <asp:ControlParameter Name="EmployeeID" ControlId="DropDownList1" PropertyName="SelectedValue"/>
          </UpdateParameters>
      </asp:SqlDataSource>

      <asp:DropDownList
          id="DropDownList1"
          runat="server"
          DataTextField="LastName"
          DataValueField="EmployeeID"
          DataSourceID="SqlDataSource1">
      </asp:DropDownList>

      <br />
      <asp:Label id="Label1" runat="server" Text="Enter a new address for the selected user."
        AssociatedControlID="TextBox1" />
      <asp:TextBox id="TextBox1" runat="server" />
      <asp:Button id="Submit" runat="server" Text="Submit" OnClick="On_Click" />

      <br /><asp:Label id="Label2" runat="server" Text="" />

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

The following code example demonstrates how to set the SelectCommand text to the name of a stored procedure to retrieve data from a SQL Server database and display it in a DropDownList control. The SelectCommand property can be an SQL query or the name of a stored procedure, if the data source supports stored procedures.

No code example is currently available or this language may not be supported.
<!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>ASP.NET Example</title>
</head>
<body>
        <form id="form1" runat="server">

            <asp:DropDownList
                id="DropDownList1"
                runat="server"
                DataTextField="LastName"
                DataSourceID="SqlDataSource1" />

            <asp:SqlDataSource
                id="SqlDataSource1"
                runat="server"
                ConnectionString="Data Source=localhost;Integrated Security=SSPI;Initial Catalog=Northwind;"
                SelectCommand="sp_lastnames">
            </asp:SqlDataSource>

            <!--
                The sp_lastnames stored procedure is
                CREATE PROCEDURE sp_lastnames AS
                   SELECT LastName FROM Employees
                GO
            -->

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

Windows 98, Windows Server 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0

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