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ParameterCollection.RemoveAt Method

Note: This method is new in the .NET Framework version 2.0.

Removes the Parameter object at the specified index from the ParameterCollection collection.

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

public void RemoveAt (
	int index
)
public void RemoveAt (
	int index
)
public function RemoveAt (
	index : int
)

Parameters

index

The index of the Parameter to remove.

Use the RemoveAt method to remove the Parameter object at the specified index from the collection.

The following code example demonstrates how to use the RemoveAt method to remove a Parameter object from a ParameterCollection collection at a specific location. In this example, several QueryStringParameter objects are added to a SelectParameters collection, one QueryStringParameter object is removed from the collection, and the order of the collection is printed when the page loads.

<%@page Language="C#" %>
<SCRIPT runat="server">
private void Page_Load(object sender, EventArgs e) {

    SqlDataSource aSqlDataSource = new SqlDataSource();

    // Security Note: The SqlDataSource uses a QueryStringParameter,
    // Security Note: which does not perform validation of input from the client.

    QueryStringParameter qs1 =
        new QueryStringParameter("QueryStringParam1","requestfield1");

    aSqlDataSource.SelectParameters.Add(qs1);

    QueryStringParameter qs3 =
        new QueryStringParameter("QueryStringParam2","requestfield2");

    aSqlDataSource.SelectParameters.Add(qs3);

    // Insert another QueryStringParameter with the same name as the previous parameter.
    aSqlDataSource.SelectParameters.Add( new QueryStringParameter("QueryStringParameter2","requestfield3") );

    // There are two parameters named QueryStringParam3. Use the
    // RemoveAt method to remove the last element from the collection.
    aSqlDataSource.SelectParameters.RemoveAt( (aSqlDataSource.SelectParameters.Count - 1) );

    // Iterate through the ParameterCollection and print out the
    // names of the Parameters contained by it.
    foreach (Parameter aParameter in aSqlDataSource.SelectParameters) {
        Response.Write(aParameter.Name + "<BR>");
        QueryStringParameter qsptemp = (QueryStringParameter) aParameter;
        Response.Write("QueryStringField is " + qsptemp.QueryStringField + "<BR>");
    }
}
</SCRIPT>

<%@page Language="VJ#" %>
<SCRIPT runat="server">
private void Page_Load(Object sender, System.EventArgs e)
{
    SqlDataSource aSqlDataSource = new SqlDataSource();
    
    QueryStringParameter qs1 = 
        new QueryStringParameter("QueryStringParam1","requestfield1");

    aSqlDataSource.get_SelectParameters().Add(qs1);
        
    QueryStringParameter qs3 = 
        new QueryStringParameter("QueryStringParam2","requestfield2");
        
    aSqlDataSource.get_SelectParameters().Add(qs3);
    
    // Insert another QueryStringParameter with the same name as the previous
    // parameter.
    aSqlDataSource.get_SelectParameters().Add( new QueryStringParameter(
        "QueryStringParameter2","requestfield3") );    
           
    // There are two parameters named QueryStringParam3. Use the 
    // RemoveAt method to remove the last element from the collection.  
    aSqlDataSource.get_SelectParameters().RemoveAt( 
        (aSqlDataSource.get_SelectParameters().get_Count() - 1) );
        
    // Iterate through the ParameterCollection and print out the 
    // names of the Parameters contained by it.
    for(int iCtr =0; iCtr < aSqlDataSource.get_SelectParameters().
        get_Count(); iCtr++) {
            Parameter aParameter = aSqlDataSource.get_SelectParameters().
                get_Item(iCtr);
            get_Response().Write(aParameter.get_Name() + "<BR>");
            QueryStringParameter qsptemp = (QueryStringParameter) aParameter;
                get_Response().Write("QueryStringField is " 
                + qsptemp.get_QueryStringField() + "<BR>");

    }
} //Page_Load
</SCRIPT>

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

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0

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