How to convert DataGrid to dataTable

Question

I want to copy all the datagrid records into datatable without using any loop. For Ex:

Dim dt as New DataTable
dt = Datagrid1.Items

But this is not Working and giving an error message.

My Development platform is Visual studio 2010 and language is WPF with vb.net 4.0

Answer 1

This is the way to transfer all the records from DATAGRID to DATATABLE without using the LOOP.

VB:

Dim dt As New DataTable
dt = CType(DataGrid1.ItemsSource, DataView).ToTable

C#:

DataTable dt = new DataTable();
dt = ((DataView)DataGrid1.ItemsSource).ToTable();  

Answer 2

To convert your dataGrid into data table whith header row you can follow this steps:

1) create the method to retrive the cell

  static public DataGridCell GetCell(DataGrid dg, int row, int column)
    {
        DataGridRow rowContainer = GetRow(dg, row);

        if (rowContainer != null)
        {
            DataGridCellsPresenter presenter = GetVisualChild<DataGridCellsPresenter>(rowContainer);
            DataGridCell cell = (DataGridCell)presenter.ItemContainerGenerator.ContainerFromIndex(column);
            if (cell == null)
            {
                dg.ScrollIntoView(rowContainer, dg.Columns[column]);
                cell = (DataGridCell)presenter.ItemContainerGenerator.ContainerFromIndex(column);
            }
            return cell;
        }
        return null;
    }

2) Iterate through all items and pass the content to dada table "cell"

    private void DataGridToDataTable()
    {
        DataTable dt = new DataTable();
        var j = byte.MinValue;//header row handler
        dt.Rows.Add();
        foreach (DataGridColumn column in dataGrid1.Columns)
        {                
            dt.Columns.Add(column.GetValue(NameProperty).ToString());
            dt.Rows[byte.MinValue][j++] = column.Header;
        }

        //data rows handler
        for (int i = byte.MinValue ; i < dataGrid1.Items.Count; i++)
        {
            dt.Rows.Add();
            for (j = Byte.MinValue; j < dataGrid1.Columns.Count; j++)
            {
                DataGridCell dgc = GetCell(dataGrid1, i, j);
                dt.Rows[i + 1][j] =  ((dgc.Content) as TextBlock).Text;
            }
        }
    }  

Keep in mind to use this methods you must will reference this using

using System.Windows.Media;
using System.Data;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;

And here a helper class just to use it.

 /// <summary>
/// Class to help to retrive the Data Grid Contain
/// </summary>
public static class DataGridHelper
{
    /// <summary>
    /// Retrive the cell contains
    /// </summary>
    /// <param name="dg">DataGrid</param>
    /// <param name="row">row</param>
    /// <param name="column">column</param>
    /// <returns>DataGrid Cell content</returns>
    static public DataGridCell GetCell(DataGrid dg, int row, int column)
    {
        DataGridRow rowContainer = GetRow(dg, row);

        if (rowContainer != null)
        {
            DataGridCellsPresenter presenter = GetVisualChild<DataGridCellsPresenter>(rowContainer);

            // try to get the cell but it may possibly be virtualized
            DataGridCell cell = (DataGridCell)presenter.ItemContainerGenerator.ContainerFromIndex(column);
            if (cell == null)
            {
                // now try to bring into view and retreive the cell
                dg.ScrollIntoView(rowContainer, dg.Columns[column]);
                cell = (DataGridCell)presenter.ItemContainerGenerator.ContainerFromIndex(column);
            }
            return cell;
        }
        return null;
    }
    /// <summary>
    /// Get row content
    /// </summary>
    /// <param name="dg">Datagrid</param>
    /// <param name="index">Index</param>
    /// <returns>DataGridRow</returns>
    static public DataGridRow GetRow(DataGrid dg, int index)
    {
        DataGridRow row = (DataGridRow)dg.ItemContainerGenerator.ContainerFromIndex(index);
        if (row == null)
        {
            // may be virtualized, bring into view and try again
            dg.ScrollIntoView(dg.Items[index]);
            row = (DataGridRow)dg.ItemContainerGenerator.ContainerFromIndex(index);
        }
        return row;
    }
    static T GetVisualChild<T>(Visual parent) where T : Visual
    {
        T child = default(T);
        int numVisuals = VisualTreeHelper.GetChildrenCount(parent);
        for (int i = 0; i < numVisuals; i++)
        {
            Visual v = (Visual)VisualTreeHelper.GetChild(parent, i);
            child = v as T;
            if (child == null)
            {
                child = GetVisualChild<T>(v);
            }
            if (child != null)
            {
                break;
            }
        }
        return child;
    }
}