I have a WPF DataGrid and I am setting up columns manually in code behind. I am trying to set the column size to Auto with the following code:

customBoundColumn.Width = double.NaN;

But then at run-time I get the following error:

Value should not be infinity. Parameter name: value

I read in many places that double.NaN is what is used to set the column size to auto. What am I doing wrong?

P.S. customBoundColumn is an instance of DataGridBoundColumn

3

There are 3 answers

2
Rachel On BEST ANSWER

I believe you can simply use DataGridLength.Auto to set your width back to Auto

customBoundColumn.Width = DataGridLength.Auto;
1
Rohit Vats On

Deafult width and height is Auto for all FrameworkElement-derived classes and so is for dataGrid columns. So, why do you need to set it explicitly in code behind?

1
Vinit Sankhe On

In versions prior to .Net 4.0, the width of a datagrid column is set as

         customBoundColumn.Width = new DataGridLength(0, DataGridLengthUnitType.Auto);

I am not sure what is it in .Net 4.0.