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DataGridView.DataError Event

.NET Framework 2.0

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

Occurs when an external data-parsing or validation operation throws an exception, or when an attempt to commit data to a data source fails.

Namespace: System.Windows.Forms
Assembly: System.Windows.Forms (in system.windows.forms.dll)

Syntax

C++

public event DataGridViewDataErrorEventHandler DataError

/** @event */
public void add_DataError (DataGridViewDataErrorEventHandler value)

/** @event */
public void remove_DataError (DataGridViewDataErrorEventHandler value)

JScript

JScript supports the use of events, but not the declaration of new ones.

Remarks

The DataError event enables you to handle exceptions thrown in code that is called by the control during data processing operations.

For more information about handling events, see Consuming Events.

Example

The following code example demonstrates a DataError event handler.

C++

private void DataGridView1_DataError(object sender, DataGridViewDataErrorEventArgs anError)
{

    MessageBox.Show("Error happened " + anError.Context.ToString());

    if (anError.Context == DataGridViewDataErrorContexts.Commit)
    {
        MessageBox.Show("Commit error");
    }
    if (anError.Context == DataGridViewDataErrorContexts.CurrentCellChange)
    {
        MessageBox.Show("Cell change");
    }
    if (anError.Context == DataGridViewDataErrorContexts.Parsing)
    {
        MessageBox.Show("parsing error");
    }
    if (anError.Context == DataGridViewDataErrorContexts.LeaveControl)
    {
        MessageBox.Show("leave control error");
    }

    if ((anError.Exception) is ConstraintException)
    {
        DataGridView view = (DataGridView)sender;
        view.Rows[anError.RowIndex].ErrorText = "an error";
        view.Rows[anError.RowIndex].Cells[anError.ColumnIndex].ErrorText = "an error";

        anError.ThrowException = false;
    }
}

Platforms

Windows 98, Windows 2000 SP4, Windows Millennium Edition, 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.

Version Information

.NET Framework

Supported in: 2.0

Reference

DataGridView Class
DataGridView Members
System.Windows.Forms Namespace
DataGridViewDataErrorEventHandler
DataGridViewDataErrorEventArgs

Other Resources

DataGridView Control (Windows Forms)

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