C# datagridview selectedindexchanged datagridviewcombobox

使用 DataGridView Combobox 的 SelectionChangeComfilled 事件获取新值或索引

发布于 2024-12-14 19:08:42 字数 608 浏览 9 评论 0原文

我使用 SelectionChangeCommited 来捕获组合框选定索引更改时的事件，但我无法获取它的新值或索引。

private void ruleList_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
    {
        if (e.Control is ComboBox)
        {
            ComboBox comboBox = e.Control as ComboBox;
            comboBox.SelectionChangeCommitted += ruleListColumnComboSelectionChanged;
        }
    }

    private void ruleListColumnComboSelectionChanged(object sender, EventArgs e)
    {
        string value = ruleList.CurrentCell.Value.ToString(); // just return the old value before the change
    }

原文

im using SelectionChangeCommitted to catch the event when a combobox selected index changed, but I can not get it's new value or index.

private void ruleList_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
    {
        if (e.Control is ComboBox)
        {
            ComboBox comboBox = e.Control as ComboBox;
            comboBox.SelectionChangeCommitted += ruleListColumnComboSelectionChanged;
        }
    }

    private void ruleListColumnComboSelectionChanged(object sender, EventArgs e)
    {
        string value = ruleList.CurrentCell.Value.ToString(); // just return the old value before the change
    }

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野鹿林 2024-12-21 19:08:42

您好，尝试使用 CommitEdit 关键字 (CommitEdit，MSDN 页面上也有一个示例）。将其添加到您的 DataGridView 中：

// This event handler manually raises the CellValueChanged event
// by calling the CommitEdit method.
void dataGridView1_CurrentCellDirtyStateChanged(object sender,
    EventArgs e)
{
    if (dataGridView1.IsCurrentCellDirty)
    {
        dataGridView1.CommitEdit(DataGridViewDataErrorContexts.Commit);
    }
}

然后您只需监听 CellValueChanged 并避免必须尝试在底层编辑控件上注册 ComboBoxValueChanged 事件。

Hi try using the CommitEdit keyword (CommitEdit, there is also an example on the MSDN page). Add this to your DataGridView:

// This event handler manually raises the CellValueChanged event
// by calling the CommitEdit method.
void dataGridView1_CurrentCellDirtyStateChanged(object sender,
    EventArgs e)
{
    if (dataGridView1.IsCurrentCellDirty)
    {
        dataGridView1.CommitEdit(DataGridViewDataErrorContexts.Commit);
    }
}

Then you could just listen for the CellValueChanged and avoid having to try and register for the ComboBoxValueChanged event on the underlying editing control.

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反差帅 2024-12-21 19:08:42

您可以使用以下方法获取新值：

ComboBox comboBox = sender.Control as ComboBox;
MessageBox.Show(comboBox.Text);

You can get the new Value using:

ComboBox comboBox = sender.Control as ComboBox;
MessageBox.Show(comboBox.Text);

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悲喜皆因你 2024-12-21 19:08:42

如果我理解得很好，您正在对组合框中的 SelectionChangeCommissed 事件做出反应，但尝试通过网格获取值。这是正确的吗？

RuleList中的承诺是如何完成的？
承诺在那个时间点已经发生了吗？

我的感觉是，通过这个 SelectionChangeCommited 事件，您可以直接从组合框中访问值，但还不能通过网格访问，因为它尚未提交。

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浸婚纱 2024-12-21 19:08:42

改进 Killercam 的方法，您可以检查当前单元格是否为 datagridviewcomboboxcell 并执行（在 VB 中，您可以轻松转换为了完整起见，

If TypeOf CType(sender, DataGridView).CurrentCell Is DataGridViewComboBoxCell Then
    CType(sender, DataGridView).CommitEdit(DataGridViewDataErrorContexts.Commit)
    CType(sender, DataGridView).EndEdit()
End If

我还添加了 EndEdit() 方法。

Improving on Killercam's method, you can check for the currentcell being a datagridviewcomboboxcell and do (in VB which you can easily convert to C#)

If TypeOf CType(sender, DataGridView).CurrentCell Is DataGridViewComboBoxCell Then
    CType(sender, DataGridView).CommitEdit(DataGridViewDataErrorContexts.Commit)
    CType(sender, DataGridView).EndEdit()
End If

I also added the EndEdit() method for completeness.

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