DataGrid Row Header WPF

Question

I have a populated DataTable (xDataTable) with 7 defined columns - the first column I want to use as my RowHeader.

I also have a DataGrid:

Answer 1

Use the below style (usual case):

<DataGrid.RowHeaderStyle>
    <Style TargetType="{x:Type DataGridRowHeader}">
        <Setter Property="Content" Value="{Binding RelativeSource={RelativeSource AncestorType={x:Type DataGrid}},Path=Columns[0].Header,Mode=OneTime}" />
    </Style>
</DataGrid.RowHeaderStyle>

If we want separate RowHeader for separate Row then use:

<DataGrid.RowStyle>
    <Style TargetType="{x:Type DataGridRow}">
        <Setter Property="IsSelected" Value="{Binding IsRowSelected}" />
        <Setter Property="Header" Value="{Binding Content}" />
    </Style>
</DataGrid.RowStyle>

Just change the above binding as required.

If the first column is:

<DataGridTextColumn Binding="{Binding Content}" Header="Content"/>

then remove this column and use this binding for the Header.

Answer 2

you can set any headers whatever you want. Just add your columns like that:

 DataTable.Columns.Add("I am a Column Header!:)");

Let' see MVVM example:

public class YourViewModel : ViewModelBase
{
    public YourViewModel()
    {
        PopulateDataTable();
    }

    private void PopulateDataTable()
    {
        var _ds = new DataSet("Test");
        employeeDataTable = new DataTable();
        employeeDataTable = _ds.Tables.Add("DT");
        for (int i = 0; i < 20; i++)
        {                
            //you can set any Header in the following line
            employeeDataTable.Columns.Add(i.ToString());
        }
        for (int i = 0; i < 10; i++)
        {
            var theRow = employeeDataTable.NewRow();
            for (int j = 0; j < 20; j++)
            {
                theRow[j] = "a";                    
            }
            employeeDataTable.Rows.Add(theRow);
        }
    }

     private DataTable employeeDataTable;

     public DataTable EmployeeDataTable
     {
        get { return employeeDataTable; }
        set
        {
            employeeDataTable = value;
            OnPropertyChanged("EmployeeDataTable");
        }
     }
}

Your XAML:

<DataGrid ItemsSource="{Binding EmployeeDataTable}" />

Update:

Let's see code-behind example:

Your XAML:

<DataGrid Name="dataGrid"/>

Your code-behind:

//constructor of the Window
public MainWindow()
{
    InitializeComponent();
    PopulateDataGrid();
}

DataTable employeeDataTable = new DataTable();


private void PopulateDataGrid()
{
   var _ds = new DataSet("Test");

   employeeDataTable = _ds.Tables.Add("DT");
   for (int i = 0; i < 10; i++)//create columns
   {   
        employeeDataTable.Columns.Add("I am a column!:)");
   }

   for (int i = 0; i < 50; i++)//fill data to rows
   {
       var theRow = employeeDataTable.NewRow();
       for (int j = 0; j < 10; j++)
       {
          if (j % 2 == 0)                    
              theRow[j] = "a";  
          else                  
              theRow[j] = "b";
       }
       employeeDataTable.Rows.Add(theRow);
   }
   dataGrid.ItemsSource = employeeDataTable.AsDataView();
}