Hi,

Code snippet -

aspx page:-

<%@ Register Assembly="Infragistics35.Web.v10.2, Version=10.2.20102.2158, Culture=neutral, PublicKeyToken=7dd5c3163f2cd0cb"
    Namespace="Infragistics.Web.UI.GridControls" TagPrefix="ig" %>

<ig:WebDataGrid ID="wdgMatrix" runat="server" AutoGenerateColumns="False" Height="370px"
                                    Width="100%" StyleSetPath="~/Styles/" StyleSetName="Trendy" DefaultColumnWidth="130px"
                                    OnRowAdding="wdgMatrix_RowAdding" OnRowUpdating="wdgMatrix_RowUpdating" OnRowsDeleting="wdgMatrix_RowDeleting" OnColumnSorted="wdgMatrix_ColumnSorted" >
                                    <Behaviors>
                                    </Behaviors>
                                </ig:WebDataGrid>

aspx.cs page

protected void wdgMatrix_RowUpdating(object sender, RowUpdatingEventArgs e)
        {
            MatrixTables mat = new MatrixTables(((SessionInfo)Session["UserInformation"]).DatabaseName.ToString());
            DataTable dtNew = new DataTable();
            int id1 = (int)((Infragistics.Web.UI.GridControls.ControlDataRecord)(e.Row)).DataKey[0];
            DataRow foundRow = dtGridSource.Rows.Find(id1);
            XmlString.AppendFormat("<{0}>", "Matrix");
            foreach (DataColumn dc in DtGrid.Columns)
            {
                DataColumn dcNew = new DataColumn(dc.ColumnName, dc.DataType);
                dtNew.Columns.Add(dcNew);
                if (dc.DataType.ToString() == "System.String")
                    foundRow[dc.ColumnName.ToString()] = e.Values[dc.ColumnName].ToString();
                else if (dc.DataType.ToString() == "System.Int32")
                    foundRow[dc.ColumnName] = Convert.ToInt32(e.Values[dc.ColumnName]);
                XmlString.AppendFormat("<{0}>", "value");
                XmlString.AppendFormat("<ColValue>{0}</ColValue>", dc.ColumnName);
                XmlString.AppendFormat("<RowValue>{0}</RowValue>", e.Values[dc.ColumnName]);
                XmlString.AppendFormat("</{0}>", "value");
            }
            XmlString.AppendFormat("</{0}>", "Matrix");
            mat.UpdateMatrix(id1, TableName, XmlString.ToString());
        }