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DataSet.HasChanges Method ()

Gets a value indicating whether the DataSet has changes, including new, deleted, or modified rows.

Namespace: System.Data
Assembly: System.Data (in system.data.dll)

public bool HasChanges ()
public boolean HasChanges ()
public function HasChanges () : boolean

Return Value

true if the DataSet has changes; otherwise false.

The following example uses the GetChanges method to create a second DataSet object that is then used to update a data source.

private void UpdateDataSet(DataSet dataSet)
{
    // Check for changes with the HasChanges method first.
    if(!dataSet.HasChanges()) return;

    // Create temporary DataSet variable.
    DataSet tempDataSet;

    // GetChanges for modified rows only.
    tempDataSet = dataSet.GetChanges(DataRowState.Modified);

    // Check the DataSet for errors.
    if(tempDataSet.HasErrors)
    {
        // Insert code to resolve errors.
    
    // After fixing errors, update the data source with 
    // the DataAdapter used to create the DataSet.
    myOleDbDataAdapter.Update(tempDataSet);


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
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