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：

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。