C# WPF how can I set maxlength in datagridtextcolumns in code

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I have built a datagrid dynamicly, but found no way to set a MaxLength for a DataGridTextColumn. In Xaml it looks like this:

<DataGridTextColumn.EditingElementStyle>
	<Style TargetType="{x:Type TextBox}">
		<Setter Property="MaxLength" Value="10"/>
	</Style>
</DataGridTextColumn.EditingElementStyle>

What I have tried:

I tried this, but it does'nt work:

Style CellStyleLength = new Style(typeof(DataGridCell));
CellStyleLength.Setters.Add(new Setter(TextBox.MaxLengthProperty, 10));
DataGridTextColumn c1 = new DataGridTextColumn
                        {
                        Header = "Anrede",
                        Binding = new Binding("anrede"),
                        Width = 200,
                        CellStyle = CellStyleLength,
                        };
DgrShow.Columns.Add(c1);

Posted 13-Dec-22 10:16am

Member 12459153

Updated 13-Dec-22 19:13pm

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Mike Hankey · Accepted Answer · 2022-12-13T19:13:00

Solution 1

Try this;

XML

<DataGridTextColumn.EditingElementStyle>
	<Style TargetType="TextBox">
		<Setter Property="MaxLength" Value="10"/>
	</Style>
</DataGridTextColumn.EditingElementStyle>

Posted 13-Dec-22 19:13pm

Mike Hankey

Comments

Member 12459153 14-Dec-22 7:12am

Hi Mike, thanks for your answer. The Solution in Xaml ist not the problem. I want to create a DataGrid by code an implement a solution for the Cellstyle of textlength in my c# code.

Mike Hankey 14-Dec-22 9:39am

Sorry mis-read your post, this might work.

Style _style = new Style(typeof(TextBox));
_style.Setters.Add(new Setter(TextBox.MaxLengthProperty, 10));

dg.AutoGenerateColumns=false;

dg.Columns.Add(new DataGridTextColumn()
{
Header="Anrede",
Binding=new Binding("Anrede"),
EditingElementStyle=_style

});

Member 12459153 14-Dec-22 11:25am

Hi Mike, thanks a lot. That is the solution. I spent a lot of hours with this problem and found no info by googeling :-)