只允许用户点击第一个datagridview行C＃ [英] Only allow user to click first datagridview row C#

问题描述

是否可以仅允许用户选择datagridview框中的第一项。到目前为止这是我的代码，阻止所有使用 - 包括第一行...

Is it possible to only allow the user to select the first item in the datagridview box. So far this is the code I have, blocks all use - including the first row...

private void productionDataGridView_CellDoubleClick(object sender, DataGridViewCellEventArgs e)
{
    if (productionDataGridView.SelectedRows.Count <= 1)
    {
        MessageBox.Show("Please select the first item in list");
    }
    else if (productionDataGridView.SelectedRows.Count == 0)
    {
        productionDataGridView.CurrentRow.Cells[4].Value.ToString().Split(',').ToList().ForEach(r => listBox2.Items.Add(r.Trim()));
        OrderIDTxt.Text = this.productionDataGridView.CurrentRow.Cells[0].Value.ToString();

    }
}

我的尝试：



重新安排代码和谷歌 - 但是没有太多关于它的信息

What I have tried:

re arranging code and google - but theres not much information about it

推荐答案

嗯。

Um.

if (productionDataGridView.SelectedRows.Count <= 1)
{
    MessageBox.Show("Please select the first item in list");
}

因此，如果他选择任何东西，无论他选择哪一行，计数都将是一个或多个...



Plus，双击并不是选择行的唯一方法：单击即可完成，单击一下，然后单击CTRL，第二行单击，或者......



相反，处理SelectionChanged事件：

So if he selects anything, the count will be one or more regardless of the row he selects...

Plus, Double click isn't the only way to select a row: a single click will do it, as will a single click followed by CTRL and a second row single click, or ...

Instead, handle the SelectionChanged event:

private void myDataGridView_SelectionChanged(object sender, EventArgs e)
    {
    DataGridView dgv = sender as DataGridView;
    if (dgv != null)
        {
        DataGridViewSelectedRowCollection selected = dgv.SelectedRows;
        if (selected.Count != 1 || selected[0].Index != 0)
            {
            dgv.ClearSelection();
            }
        }
    }

并且用户无法选择除第一行以外的任何内容。

And the user can't select anything except the first row.

请阅读文档！ DataGridView.SelectedRows Property（System.Windows。表格） [ ^ ]获取用户选择的行集合，但您需要找出 CurrentRow [ ^ ]是第一行（行[0 ] ）！

我建议使用此事件： DataGridView.SelectionChanged事件（System.Windows.Forms） [ ^ ]

Please, read the documentation! DataGridView.SelectedRows Property (System.Windows.Forms)[^] gets the collection of rows selected by the user, but you need to find out that CurrentRow[^] is first row (Rows[0])!
I'd suggest to use this event: DataGridView.SelectionChanged Event (System.Windows.Forms)[^]

if(productionDataGridView.CurrentRow != productionDataGridView.Rows[0])
{
    //MessageBox.Show("Please select the first item in list");
    productionDataGridView.CurrentCell = productionDataGridView.Rows[0].Cells[e.ColumnIndex]; //change selection to first row
}

详情请见：

如何：获取Windows窗体DataGridView控件中的选定单元格，行和列Microsoft Docs [ ^ ]

DataGridView.CurrentCell Property（System.Windows.Forms） [ ^ ]

DataGridViewCell类（System.Windows.Forms） [ ^ ]

For further details, please see:
How to: Get the Selected Cells, Rows, and Columns in the Windows Forms DataGridView Control | Microsoft Docs[^]
DataGridView.CurrentCell Property (System.Windows.Forms)[^]
DataGridViewCell Class (System.Windows.Forms)[^]

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