DataGridView在HeaderCell显示行号

直接显示在HeaderCell中。,效果以下:this

一、RowStateChanged事件触发spa

二、若是仅用于数据展现,RowStateChanged事件会触发屡次,数据量过大会卡死,所以,使用了ColumnHeaderMouseClick事件,点击列头部 从新排列时才进行行号的刷新3d

  注意:绑定数据源时进行一次刷新code

三、行号没有彻底显示出来的解决办法是将DataGridView的RowHeadersWidthSizeMode属性设置为AutoSizeToAllHeaders、AutoSizeToDisplayedHeaders或者AutoSizeToFirstHeader。orm

private void dataGridView1_ColumnHeaderMouseClick(object sender, DataGridViewCellMouseEventArgs e)
        {
            //显示在HeaderCell上
            for (int i = 0; i < this.dataGridView1.Rows.Count; i++)
            {
                DataGridViewRow r = this.dataGridView1.Rows[i];
                r.HeaderCell.Value = string.Format("{0}", i + 1);
            }
            this.dataGridView1.Refresh();
        }

        private void Test1_Load(object sender, EventArgs e)
        {
            dataGridView1.DataSource = Common.GetTestDT(40,40);

            //行号显示在HeaderCell上
            for (int i = 0; i < this.dataGridView1.Rows.Count; i++)
            {
                DataGridViewRow r = this.dataGridView1.Rows[i];
                r.HeaderCell.Value = string.Format("{0}", i + 1);
            }
            this.dataGridView1.Refresh();
        }

        private void dataGridView1_RowStateChanged(object sender, DataGridViewRowStateChangedEventArgs e)
        {
            ////显示在HeaderCell上
            //for (int i = 0; i < this.dataGridView1.Rows.Count; i++)
            //{
            //    DataGridViewRow r = this.dataGridView1.Rows[i];
            //    r.HeaderCell.Value = string.Format("{0}", i + 1);
            //}
            //this.dataGridView1.Refresh();
        }
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