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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()

Return Value

Type: System.Boolean
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 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

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

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

XNA Framework

Supported in: 3.0, 2.0, 1.0

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