C# DataGridView隔行变色&鼠标经过改变形状、固定行高、行号、列自动填充等等

本文介绍如何使用简单代码实现DataGridView的隔行变色效果，并提供鼠标悬停时改变行背景颜色及鼠标形状的方法。此外，还展示了如何禁止用户调整行高、设置列宽自动填充以及显示行号。

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设置数据列表控件隔行变色

只需两句代码即可搞定，非常舒服。

dataGridViewX1.RowsDefaultCellStyle.BackColor = Color.FromArgb(237, 243, 254);
dataGridViewX1.AlternatingRowsDefaultCellStyle.BackColor = Color.FromArgb(199, 237, 204);

鼠标经过改变形状及行变色

参照：http://www.cnblogs.com/greatverve/archive/2012/08/09/DataGridView-MouseEnter-MouseLeave.html

首先添加CellMouseEnter()与CellMouseLeave()事件。

/// <summary>
/// 用来记录先前的颜色值
/// </summary>
Color colorTmp = Color.White;
/// <summary>
/// 记录鼠标形状
/// </summary>
Cursor cursorTmp = Cursor.Current;
private void dataGridView1_CellMouseEnter(object sender, DataGridViewCellEventArgs e)
{
    if (e.RowIndex >= 0)
    {
        colorTmp = dataGridView1.Rows[e.RowIndex].DefaultCellStyle.BackColor;
        dataGridView1.Rows[e.RowIndex].DefaultCellStyle.BackColor = Color.Silver;
        if (e.ColumnIndex == 1)//改变第二列鼠标形状
        {
            cursorTmp = this.Cursor;
            this.Cursor = Cursors.Hand;
        }
    }
}

private void dataGridView1_CellMouseLeave(object sender, DataGridViewCellEventArgs e)
{
    if (e.RowIndex >= 0)
    {
        dataGridView1.Rows[e.RowIndex].DefaultCellStyle.BackColor = colorTmp;
        if (e.ColumnIndex == 1)
        {
            this.Cursor = cursorTmp;
        }
    }
}

禁止用户改变DataGridView1所有行的行高
DataGridView1.AllowUserToResizeRows = false;

列宽度自动填充：

AutoSizeColumnsMode属性设为Fill;

http://blog.youkuaiyun.com/lenovouser/article/details/6000169

行号显示：

http://blog.youkuaiyun.com/xieyufei/article/details/9769631

http://www.cnblogs.com/JuneZhang/archive/2011/11/21/2257630.html

http://www.jb51.net/article/40686.htm

private void dgGrid_RowPostPaint(object sender, DataGridViewRowPostPaintEventArgs e)
{
var grid = sender as DataGridView;
var rowIdx = (e.RowIndex + 1).ToString();

var centerFormat = new StringFormat()
{
// right alignment might actually make more sense for numbers
Alignment = StringAlignment.Center,
LineAlignment = StringAlignment.Center
};

var headerBounds = new Rectangle(e.RowBounds.Left, e.RowBounds.Top, grid.RowHeadersWidth, e.RowBounds.Height);
e.Graphics.DrawString(rowIdx, this.Font, SystemBrushes.ControlText, headerBounds, centerFormat);
}