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BindingContext.Contains Method (Object)

Gets a value indicating whether the BindingContext contains the BindingManagerBase associated with the specified data source.

Namespace: System.Windows.Forms
Assembly: System.Windows.Forms (in

public bool Contains (
	Object dataSource
public boolean Contains (
	Object dataSource
public function Contains (
	dataSource : Object
) : boolean
Not applicable.



An Object that represents the data source.

Return Value

true if the BindingContext contains the specified BindingManagerBase; otherwise, false.

See the Binding class for a list of possible data sources and information about creating bindings between controls and data sources.

See the Item property for information about returning a BindingManagerBase using only a data source.

The following code example uses the Contains method to determine whether a BindingManagerBase exists for each control on a form. The example passes each DataTable in a DataSet to the method.

private void TryContains(DataSet myDataSet){
    // Test each DataTable in a DataSet to see if it is bound to a BindingManagerBase.
    foreach(DataTable thisTable in myDataSet.Tables){
       Console.WriteLine(thisTable.TableName + ": " + this.BindingContext.Contains(thisTable));

private void TryContains(DataSet myDataSet)
    // Test each DataTable in a DataSet to see if it is bound to a 
    // BindingManagerBase.        
    for (int iCtr = 0; iCtr < myDataSet.get_Tables().get_Count(); iCtr++) {
        DataTable thisTable = myDataSet.get_Tables().get_Item(iCtr);
        Console.WriteLine((thisTable.get_TableName() + ": "  
            + this.get_BindingContext().Contains(thisTable)));
} //TryContains

private function TryContains(myDataSet : DataSet){
    // Test each DataTable in a DataSet to see if it is bound to a BindingManagerBase.
    for(var thisTable : DataTable in myDataSet.Tables){
       Console.WriteLine(thisTable.TableName + ": " + this.BindingContext.Contains(thisTable));

Windows 98, Windows Server 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 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, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0