[Solved] Set DataFormatString maximum length

[Richard Harrigan]

Hi,

gridViewDataColumn.DataFormatString. = "{0:(###) ###-####}";

Int64.Parse("6909186699");    Displays as [phone]

Int64.Parse("69091866990");    Displays as (6909) 186-6990

How can I prevent the user from entering the 11th digit?  Do I need to handle it in the RadGridView1.CellValidating event?

Thanks
Rich

[Vanya Pavlova]

Hello Richard,

 
The DataFormatString property formats the data you displayed either in a GridViewDataColumn or GridViewComboBoxColumn. To achieve the desired result you need to validate the data on different levels. There are couple of approaches you may use, below is a sample that uses RadGridView's CellValidating event:

MainPage.xaml:

<telerik:RadGridView Margin="114,77,109,91" CellValidating="RadGridView_CellValidating" AutoGenerateColumns="False" ItemsSource="{Binding Collection}">
            <telerik:RadGridView.Columns>
                <telerik:GridViewDataColumn DataFormatString="{}{0:(###) ###-####}" UniqueName="ID" Header="P1" DataMemberBinding="{Binding Property1}"/>
                </telerik:RadGridView.Columns>
            </telerik:RadGridView>

MainPage.xaml.cs:

private void RadGridView_CellValidating (object sender, Telerik.Windows.Controls.GridViewCellValidatingEventArgs e)
        {
            if (e.Cell.Column.UniqueName == "ID")
            {

                if (e.NewValue.ToString().Length > 10)
                {
                    e.IsValid = false;
                    e.ErrorMessage = "The entered value must be 10 characters long";
                }
            }
        }

Alternatively, you can use our MaskedTextBox column.

Kind regards,
Vanya Pavlova
the Telerik team