dataGrid转换dataTable

#region dataGrid转换dataTable
   /// <summary>
   /// dataGrid转换dataTable
   /// </summary>
   /// <param name="dg">dataGrid</param>
   /// <returns>返回dataTable</returns>
   public DataTable DT(DataGrid dg)
   {
    try
    {
     DataTable dt = null;

     if(dg.DataSource is DataView)
     {
      dt = (dg.DataSource as DataView).Table;
     }
     else if(dg.DataSource is DataTable)
     {
      dt = dg.DataSource as DataTable;
     }
     else if(dg.DataSource is DataSet)
     {
      dt = (dg.DataSource as DataSet).Tables[0];
     }
     return dt;
    }
    catch (System.Exception ex)
    {
     throw ex;
    }
   }
   #endregion

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dataGrid转换dataTable

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