本文实例讲述了C#中datagridview使用tooltip控件显示单元格内容的方法。分享给大家供大家参考，具体如下：
代码如下：
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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;
namespace Exam2
{
public partial class MainForm : Form
{
private int cellColumnIndex = -1;//列索引
private int cellRowIndex = -1;//行索引
public MainForm()
{
InitializeComponent();
//设置提示工具的相关属性值
this.dgvUserInfo.ShowCellToolTips = false;
this.toolTip.AutomaticDelay = 0;
this.toolTip.OwnerDraw = true;
this.toolTip.ShowAlways = true;
this.toolTip.ToolTipTitle = " ";
this.toolTip.UseAnimation = true;
this.toolTip.UseFading = true;
}
/// <summary>
/// 显示用户信息
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void MainForm_Load(object sender, EventArgs e)
{
string sql = "select 用户ID=userID,用户名=name,用户登录名=username,用户密码=userPassword from userInfo";
SqlConnection conn = DBHelper.GetConnection();
SqlDataAdapter adapter = new SqlDataAdapter(sql,conn);
DataSet ds = new DataSet();
adapter.Fill(ds);
this.dgvUserInfo.DataSource = ds.Tables[0];
}
private void dgvUserInfo_CellMouseLeave(object sender, DataGridViewCellEventArgs e)
{
this.toolTip.Hide(this.dgvUserInfo);//鼠标移出单元格后隐藏提示工具
}
private void dgvUserInfo_CellMouseEnter(object sender, DataGridViewCellEventArgs e)
{
//判断选择单元格的有效性
if (e.RowIndex < 0 || e.ColumnIndex < 0)
{
return;
}
this.toolTip.Hide(this.dgvUserInfo);
this.cellColumnIndex = e.ColumnIndex;//获取列索引
this.cellRowIndex = e.RowIndex;//获取行索引
if (this.cellColumnIndex >= 0 && this.cellRowIndex >= 0)
{
Point mousePos = PointToClient(MousePosition);//获取鼠标当前的位置
//获取鼠标移入的单元格中的值
string tip = this.dgvUserInfo[this.cellColumnIndex, this.cellRowIndex].Value.ToString();
this.toolTip.Show(tip, this.dgvUserInfo, mousePos);//在指定位置显示提示工具
}
}
//绘制提示工具
private void toolTip_Draw(object sender, DrawToolTipEventArgs e)
{
e.Graphics.FillRectangle(Brushes.AliceBlue, e.Bounds);
e.Graphics.DrawRectangle(Pens.Chocolate, new Rectangle(0, 0, e.Bounds.Width - 1, e.Bounds.Height - 1));
e.Graphics.DrawString(this.toolTip.ToolTipTitle + e.ToolTipText, e.Font, Brushes.Red, e.Bounds);
}
}
}
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希望本文所述对大家C#程序设计有所帮助。