DataGridView控件中至少有一列没有单元格模板

ゞ浴缸里的玫瑰 2022-05-28 11:48 117阅读 0赞

**小背景**

**一个Form窗体，一个Button按钮，一个DataGridView控件，我要实现的是点击按钮，DataGridView控件增加一列。**

**第一次尝试**

private void button1_Click(object sender, EventArgs e)
            {
                DataGridViewColumn column = new DataGridViewColumn();
                column.Name = "Column0";
                column.HeaderText = "选择";      
                dataGridView1.Columns.Add(column);
            }

**问题来了，看下图：**

![20180404165123659][]

**第二次尝试：**

private void button1_Click(object sender, EventArgs e)
            {
                DataGridViewColumn column = new DataGridViewColumn();
                column.Name = "Column0";
                column.HeaderText = "选择";
                DataGridViewCell dgvcell = new DataGridViewTextBoxCell();
                column.CellTemplate = dgvcell;
                dataGridView1.Columns.Add(column);
            }

**问题又来了，多次单击按钮，就会重复增加这一列，这不是我想看到的。**

**第三次尝试：**

private void button1_Click(object sender, EventArgs e)
            {
                dataGridView1.Columns.Clear();
                DataGridViewColumn column = new DataGridViewColumn();
                column.Name = "Column0";
                column.HeaderText = "选择";
                DataGridViewCell dgvcell = new DataGridViewTextBoxCell();
                column.CellTemplate = dgvcell;
                dataGridView1.Columns.Add(column);
            }

**Now，perfect ！**

[20180404165123659]: /images/20220528/658a398de36a49458144e8ad58dda9d1.png