How to show row validation without hovering on error icon in WinForms DataGrid?
By default, WinForms DataGrid (SfDataGrid) displays validation error tooltip when hovering on the error icon in the row header cell. However, you can show tooltip immediately after the value is changed without hovering on the row header cell by using SfToolTip.
C#
SfToolTip validationToolTip = new SfToolTip();
ToolTipInfo toolTipInfo1 = new ToolTipInfo();
ToolTipItem toolTipItem1 = new ToolTipItem();
/// <summary>
/// Initializes the new instance for the Form.
/// </summary>
public Form1()
{
InitializeComponent();
sfDataGrid1.DataSource = new OrderInfoCollection().OrdersListDetails;
toolTipInfo1.RightToLeft = RightToLeft.Yes;
toolTipItem1.Style.BackColor = Color.Red;
toolTipItem1.Style.ForeColor = Color.White;
toolTipInfo1.Items.AddRange(new ToolTipItem[] { toolTipItem1 });
this.sfDataGrid1.RowValidating += SfDataGrid1_RowValidating;
this.sfDataGrid1.CurrentCellEndEdit += SfDataGrid1_CurrentCellEndEdit;
}
private void SfDataGrid1_CurrentCellEndEdit(object sender, Syncfusion.WinForms.DataGrid.Events.CurrentCellEndEditEventArgs e)
{
validationToolTip.Hide();
}
private void SfDataGrid1_RowValidating(object sender, Syncfusion.WinForms.DataGrid.Events.RowValidatingEventArgs e)
{
if ((e.DataRow.RowData as OrderInfo).Quantity == 0)
{
e.IsValid = false;
e.ErrorMessage = "Quantity is Zero";
var X = sfDataGrid1.TableControl.GetCellRectangle(e.DataRow.RowIndex, 0, false).X;
var Y = sfDataGrid1.TableControl.GetCellRectangle(e.DataRow.RowIndex, 0, false).Y;
toolTipItem1.Text = e.ErrorMessage;
validationToolTip.Show(toolTipInfo1, this.sfDataGrid1.PointToScreen(new Point(X, Y)));
}
}
Take a moment to peruse the documentation, where you can find about data validation in SfDataGrid, with code examples.
You can download the example from GitHub
Conclusion
I hope you enjoyed learning about how to show row validation without hovering on the error icon in WinForms DataGrid.
You can refer to our WinForms DataGrid feature tour page to know about its other groundbreaking feature representations. You can also explore our WinForms DataGrid documentation to understand how to create and manipulate data.
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