How do you dynamically assign a datagrid's headers in c#?

How do you dynamically assign a datagrid's headers in c#?

Consider the following XAML:

        <data:DataGrid  x:Name="dataGrid" AutoGenerateColumns="False"  Margin="1,1,1,1" >
            <data:DataGrid.Columns>
                <data:DataGridTextColumn
                    Header="Substantive"
                    Binding="{Binding Path=Substantive}"
                    IsReadOnly="True"
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                <data:DataGridTextColumn
                    Header=""
                    Binding="{Binding Path=Month[0]}"
                    IsReadOnly="True"
                    />

                <data:DataGridTextColumn
                    Header=""
                    Binding="{Binding Path=Month[1]}"
                    IsReadOnly="True"
                    />

            </data:DataGrid.Columns>

        </data:DataGrid>

In the C# code, how would I define the headers that are blank?

OK, well, if no one knows, let's go with a different question. How does one create a DataGrid from scratch in C# code instead of in XAML?

You can add columns to a datagrid as such(for textcolumn):

text2 = new DataGridTextColumn();
bind = new System.Windows.Data.Binding("ValueList");
bind.ConverterParameter = i;
bind.Converter = new IndexConverter();             
text2.Binding = bind;
text2.Header = "Header";
text2.MaxWidth = 100;
....           
datagrid1.Columns.Add(text2);

You can allso access an existing column via:

((DataGridTextColumn)datagrid1.Columns[i]).Header = "Header";

Not sure what exactly you need but:

• Creating new columns including header etc. see Do this in C# code instead of template XAML

• change the header of a column see http://msdn.microsoft.com/en-us/library/system.windows.controls.datagridcolumn.header%28v=VS.95%29.aspx

Addressing your orignal question it would seem to me that a value converter would do the job here.

public class MyConverter: IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
         // Do stuff with parameter, for example:-

         int month = Convert.ChangeType(parameter, typeof(int), culture);
         return cultrue.DateTimeFormat.GetAbbreviatedMonthName(month + 1);
    }

    public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        throw new NotImplementedException();
    }
}

Then use it in your xaml:-

     <UserControl.Resources>
          <local:MyConverter x:Key="myconv" />
     </UserControl.Resources>
     ...
        <data:DataGrid  x:Name="dataGrid" AutoGenerateColumns="False"  Margin="1,1,1,1" >
            <data:DataGrid.Columns>
                <data:DataGridTextColumn
                    Header="Substantive"
                    Binding="{Binding Path=Substantive}"
                    IsReadOnly="True"
                    />

                <data:DataGridTextColumn
                    Header="{Binding Converter={StaticResource myconv} ConverterParameter=0}"
                    Binding="{Binding Path=Month[0]}"
                    IsReadOnly="True"
                    />

                <data:DataGridTextColumn
                    Header="{Binding Converter={StaticResource myconv} ConverterParameter=1}"
                    Binding="{Binding Path=Month[1]}"
                    IsReadOnly="True"
                    />

            </data:DataGrid.Columns>

        </data:DataGrid>

When you use dataGrid.ItemsSource your DataGrid headers will be asigned to the names of variables in List you use as ItemsSource.