/// <summary>
/// 获取DataGrid的所有行是否存在验证错误。
/// </summary>
/// <param name="dg">要检查的DataGrid实例</param>
/// <returns>true 有错，false 无错</returns>
public static bool GetDataGridRowsHasError(DataGrid dg)
{
bool hasError = false ;
for (int i = 0; i < dg.Items.Count; i++)
{
DependencyObject o = dg.ItemContainerGenerator.ContainerFromIndex(i);
hasError = Validation.GetHasError(o);
if (hasError)
{
break;
}
}
return hasError;
}
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判断有验证错误 就不执行提交。
C# code
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/// <summary> /// 获取DataGrid的第一个被发现的验证错误结果。
/// </summary>
/// <param name="dg">被检查的DataGrid实例。</param>
/// <returns>错误结果。</returns>
public static ValidationError GetDataGridRowsFirstError(DataGrid dg)
{
ValidationError err=null;
for (int i = 0; i < dg.Items.Count; i++)
{
DependencyObject o = dg.ItemContainerGenerator.ContainerFromIndex(i);
bool hasError = Validation.GetHasError(o);
if (hasError)
{
err = Validation.GetErrors(o)[0];
break;
}
}
return err;
}
/// <summary>
/// 执行检查DataGrid，并提示第一个错误。重新定位到错误单元格。
/// </summary>
/// <param name="dg">被检查的DataGrid实例。</param>
/// <returns>true 有错并定位，false 无错、返回</returns>
public static bool ExcutedCheckedDataGridValidation(DataGrid dg)
{
ValidationError err = GetDataGridRowsFirstError(dg);
if (err != null)
{
string errColName = ((System.Windows.Data.BindingExpression)err.BindingInError).ParentBinding.Path.Path;
DataGridColumn errCol = dg.Columns.Single(p =>
{
if (((Binding)((DataGridTextColumn)p).Binding).Path.Path == errColName)
return true;
else return false;
});
//string errRow = ((DataRowView)((System.Windows.Data.BindingExpression)err.BindingInError).DataItem)["SWH"].ToString();
//dg.Items.IndexOf(((System.Windows.Data.BindingExpression)err.BindingInError).DataItem);
dg.SelectedItem = ((System.Windows.Data.BindingExpression)err.BindingInError).DataItem;
int errRowIndex = dg.SelectedIndex;
MessageBox.Show(string.Format("第\"{0}\"行 的\"{1}\"列的单元格数据不合法(以红色标出)，请填写正确后再执行其他操作。", errRowIndex + 1, errCol.Header), "系统消息", MessageBoxButton.OK, MessageBoxImage.Warning);
dg.CurrentCell = new DataGridCellInfo(dg.SelectedItem, errCol);
if (!((DataRowView)dg.CurrentItem).IsEdit)
{
((DataRowView)dg.CurrentItem).BeginEdit();
}
TextBox txt = dg.CurrentColumn.GetCellContent(dg.CurrentItem) as TextBox;
txt.Focus();
return true;
}
else
{
return false;
}
}
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