C# WPF Datagrid的筛选

        public static void SearchResult(DataGrid dg,string condition)
        {
            #region
            string code = string.Empty;
            DataView dv = dg.ItemsSource as DataView;
            //if (condition.Substring(0, 1) != "0" || Regex.IsMatch(condition, @"^[+-]?\d*[.]?\d*$"))
            {
                for (int i = 0; i < dv.Table.Columns.Count; i++)
                {
                    if (dv.Table.Columns[i].DataType == typeof(System.Int32) || dv.Table.Columns[i].DataType == typeof(System.Byte))
                    {
                        if (condition.Substring(0, 1) != "0" && Regex.IsMatch(condition, @"^[+-]?\d*[.]?\d*$"))
                        {
                            code += (string)dv.Table.Columns[i].ToString() + " = " + condition + " or ";
                        }
                    }
                    else if (dv.Table.Columns[i].DataType == typeof(System.DateTime))
                    {
                        try
                        {
                            code += (string)dv.Table.Columns[i].ToString() + " = ‘" + Convert.ToDateTime(condition) + "‘ or ";
                        }
                        catch (Exception)
                        {
                        }
                    }
                    else
                    {
                        code += (string)dv.Table.Columns[i].ToString() + " = ‘" + condition + "‘ or ";
                    }
                }
            }
            if (!string.IsNullOrEmpty(code))
            {
                code = code.Substring(0, code.Length - 3);
                MessageBox.Show(code);
                dv.RowFilter = code;
                //dv.Sort = "ID ASC";
                dg.ItemsSource = dv;
            }
            #endregion
            //DataTable dv = (dg.ItemsSource as DataView).Table;
            //DataTable dtNew = dv.Copy();
            //dtNew.Clear();
            //foreach (DataRow row in dv.Rows)
            //{
            //    for (int i = 0; i < dv.Columns.Count; i++)
            //    {
            //        if (row[i].ToString() == condition)
            //        {
            //            dtNew.Rows.Add(row.ItemArray);
            //            break;
            //        }
            //    }
            //}
            //dg.ItemsSource = dtNew.DefaultView;
        }