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IColumnMappingCollection.RemoveAt Method

Removes the IColumnMapping object with the specified SourceColumn name from the collection.

Namespace: System.Data
Assembly: System.Data (in

void RemoveAt (
	string sourceColumnName
void RemoveAt (
	String sourceColumnName
function RemoveAt (
	sourceColumnName : String



The case-sensitive SourceColumn name.

Exception typeCondition


A DataColumnMapping object does not exist with the specified SourceColumn name.

The following example searches for an instance of the derived class, DataColumnMapping, with the given SourceColumn name within a DataColumnMappingCollection collection. If the DataColumnMapping exists, the mapping is removed. This example assumes that a DataColumnMappingCollection collection has been created.

public void RemoveDataColumnMapping() 
    // ...
    // create columnMappings
    // ...
    if (columnMappings.Contains("Picture"))

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, 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, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0