将组合框添加到 DataGridView 标头 [英] Adding Combobox to DataGridView Headers

问题描述

当我运行我的代码时，dataGridView TopLeftHeaderCell 也有一个组合框.我该如何改变?

When I run my code, the dataGridView TopLeftHeaderCell has a combobox too. How can I change that ?

这是我的代码:

public void AddHeaders(DataGridView dataGridView)
{

        for (int i = 0; i < 4; i++)
        {
            // Create a ComboBox which will be host a column's cell
            ComboBox comboBoxHeaderCell = new ComboBox();
            comboBoxHeaderCell.DropDownStyle = ComboBoxStyle.DropDownList;
            comboBoxHeaderCell.Visible = true;

            foreach (KeyValuePair<string, string> label in _labels)
            {
                comboBoxHeaderCell.Items.Add(label.Key);
            }

            // Add the ComboBox to the header cell of the column
            dataGridView.Controls.Add(comboBoxHeaderCell);
            comboBoxHeaderCell.Location = dataGridView.GetCellDisplayRectangle(i, -1, true).Location;
            comboBoxHeaderCell.Size = dataGridView.Columns[0].HeaderCell.Size;
            comboBoxHeaderCell.Text = _labels[i].Key;

        }
}

谢谢

推荐答案

在你的代码中，

comboBoxHeaderCell.Location = dataGridView.GetCellDisplayRectangle(i, -1, true).Location;

将始终返回 0,0，因此您将 ComboBox 放在 DataGridView 的位置 0,0代码>，这就是为什么我们看到这个

will always return 0,0, and therefor you put your ComboBox at location 0,0 in the DataGridView, and that's why we see this

您可以使用 dataGridView1[i,0].size 来获得所需的大小

you can use dataGridView1[i,0].size for the size needed

我正在寻找位置

我找不到，但你可以做的是使用 dataGridView1.Width - dataGridView1[1,0].Size.Width您可以使用宽度，并删除所有标题宽度的大小，然后将它们一一添加.

i couldn't find that, but what you can do is using the dataGridView1.Width - dataGridView1[1,0].Size.Width you can use the width, and remove the size of all the headers width, and then add them one by one.

int xPos = dataGridView1.Width;

for (int i = 0; i < 4; i++)
{
   xPos -= dataGridView1[i, 0].Size.Width;
}
 ...
comboBoxHeaderCell.Size = dataGridView.Columns[0].HeaderCell.Size;
comboBoxHeaderCell.Location = new Point(xPos, 0);
xPos += comboBoxHeaderCell.Size.Width;

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