WPF：在C＃code排检测验证错误 [英] WPF: Detect row validation errors in C# code

问题描述

我想实现一个pretty的简单的任务，但没有发现曾经帮助过我迄今为止解决方案在这里的SO或以其他方式：

I want to achieve a pretty simple task, but none of the solutions here on SO or otherwise found have helped me so far:

我有一个WPF 的DataGrid ，这势必类型化的数据集。当我点击我的窗口中的OK按钮，我想检测是否有目前任何行验证错误。我想显示一个消息框，告诉来解决这些错误的用户。

I have a WPF DataGrid, which is bound to a typed data set. When I click the OK button in my window, I want to detect whether there are currently any row validation errors. I want to show a message box and tell the user to resolve these errors.

我怎样才能做到这一点？

How can I achieve this?

修改
为了使我的问题多一点precise：

EDIT
To make my question a bit more precise:

该类型化的DataSet，我结合是一个包含一个表一个简单的数据集。这些表是通过调用填充一个WCF服务，并有在表5文本列。一些这些列的有长度的限制（例如，一列可能只需要5个字符）。

The typed dataset I'm binding to is a simple data set that contains a table. The tables is filled from a call to a WCF service and there are 5 text columns in the table. Some of these columns have length constraints (for example, one column may only take 5 characters).

在的ItemsSource 我的的GridView 在code设置如下：

The ItemsSource of my GridView is set in code as follows:

dgvData.ItemsSource = m_dataModel.TableName;

如果我输入一些文本列，一切都很好。进入超过5个字符到所述柱，将显示红色行误差标记旁边的行。我没有做任何定制验证（还）。

If I enter some text into the columns, all is well. Entering more than 5 characters into said column, the red row error marker is displayed next to the row. I am not doing any custom validation (yet).

我可以看到红色感叹号，但我无法确定在code无论是可见或不可见。我试着：

I can see the red exclamation mark, but I'm not able to determine in code whether it is visible or not. I've tried to:

• 使用数据集的 HasErrors 属性（返回假）
• Validation.GetHasErrors（dgvData）返回假和
• 的soluction HB在他的评论中提到，但没有奏效

• Use the data set's HasErrors property (returns false)
• Validation.GetHasErrors(dgvData) returns false as well
• the soluction H.B.'s mentioned in his comment, but it didn't work

我在这里丢失？ - 必须有这样做的一个简单的方法

I'm at a loss here - there must be a simple way of doing this?

推荐答案

好了，我的工作了。下面我想要做什么：

OK, I've worked it out. The following does what I want:

public static DataGridRow GetRow(DataGrid grid, int index)
{
    DataGridRow row = (DataGridRow)grid.ItemContainerGenerator.ContainerFromIndex(index);
    if (row == null)
    {
        // May be virtualized, bring into view and try again.
        grid.UpdateLayout();
        grid.ScrollIntoView(grid.Items[index]);
        row = (DataGridRow)grid.ItemContainerGenerator.ContainerFromIndex(index);
    }
    return row;
}

在$ C $下我的确定按钮，我做的：

In the code for my "OK" button I do:

for (int i = 0; i < dgvData.Items.Count; i++)
{
    DataGridRow row = GetRow(dgvData, i);
    if (row != null && Validation.GetHasError(row))
    {
        hasDataGridErrors = true;
        break;
    }
}

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