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(转)在VisualStudio2005的DataGridView控件中加入ComboBox下拉列表框的实现(C#) ...

原作者: [db:作者] 来自: [db:来源] 收藏 邀请

url from:http://www.alixixi.com/Dev/Web/ASPNET/aspnet3/2007/2007050734251.html

using System;
using System.Data;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace MyNameSpace
{
    
public partial class MainForm : Form
    {
        
// 定义下拉列表框
        private ComboBox cmb_Temp = new ComboBox();

        
public MainForm()
        {
            InitializeComponent();
        }

        
/// <summary>
        
/// 绑定性别下拉列表框
        
/// </summary>
        private void BindSex()
        {
            DataTable dtSex 
= new DataTable();
            dtSex.Columns.Add(
"Value");
            dtSex.Columns.Add(
"Name");
            DataRow drSex;
            drSex 
= dtSex.NewRow();
            drSex[
0= "1";
            drSex[
1= "";
            dtSex.Rows.Add(drSex);
            drSex 
= dtSex.NewRow();
            drSex[
0= "0";
            drSex[
1= "";
            dtSex.Rows.Add(drSex);
            cmb_Temp.ValueMember 
= "Value";
            cmb_Temp.DisplayMember 
= "Name";
            cmb_Temp.DataSource 
= dtSex;
            cmb_Temp.DropDownStyle 
= ComboBoxStyle.DropDownList;
        }

        
/// <summary>
        
/// 为避免连接数据库,这里手工构造数据表,实际应用中应从数据库中获取
        
/// </summary>
        private void BindData()
        {
            DataTable dtData 
= new DataTable();
            dtData.Columns.Add(
"ID");
            dtData.Columns.Add(
"Name");
            dtData.Columns.Add(
"Sex");
            DataRow drData;
            drData 
= dtData.NewRow();
            drData[
0= 1;
            drData[
1= "张三";
            drData[
2= "1";
            dtData.Rows.Add(drData);
            drData 
= dtData.NewRow();
            drData[
0= 2;
            drData[
1= "李四";
            drData[
2= "1";
            dtData.Rows.Add(drData);
            drData 
= dtData.NewRow();
            drData[
0= 3;
            drData[
1= "王五";
            drData[
2= "1";
            dtData.Rows.Add(drData);
            drData 
= dtData.NewRow();
            drData[
0= 4;
            drData[
1= "小芳";
            drData[
2= "0";
            dtData.Rows.Add(drData);
            drData 
= dtData.NewRow();
            drData[
0= 5;
            drData[
1= "小娟";
            drData[
2= "0";
            dtData.Rows.Add(drData);
            drData 
= dtData.NewRow();
            drData[
0= 6;
            drData[
1= "赵六";
            drData[
2= "1";
            dtData.Rows.Add(drData);
            
this.dgv_User.DataSource = dtData;
        }

        
private void MainForm_Load(object sender, EventArgs e)
        {
            
// 绑定性别下拉列表框
            BindSex();

            
//绑定数据表
            BindData();

            
// 设置下拉列表框不可见
            cmb_Temp.Visible = false;

            
// 添加下拉列表框事件
            cmb_Temp.SelectedIndexChanged += new EventHandler(cmb_Temp_SelectedIndexChanged);

            
// 将下拉列表框加入到DataGridView控件中
            this.dgv_User.Controls.Add(cmb_Temp);
        }

        
// 当用户移动到性别这一列时单元格显示下拉列表框
        private void dgv_User_CurrentCellChanged(object sender, EventArgs e)
        {
            
try
            {
                
if (this.dgv_User.CurrentCell.ColumnIndex == 2)
                {
                    Rectangle rect 
= dgv_User.GetCellDisplayRectangle(dgv_User.CurrentCell.ColumnIndex, dgv_User.CurrentCell.RowIndex, false);
                    
string sexValue = dgv_User.CurrentCell.Value.ToString();
                    
if (sexValue == "1")
                    {
                        cmb_Temp.Text 
= "";
                    }
                    
else
                    {
                        cmb_Temp.Text 
= "";
                    }
                    cmb_Temp.Left 
= rect.Left;
                    cmb_Temp.Top 
= rect.Top;
                    cmb_Temp.Width 
= rect.Width;
                    cmb_Temp.Height 
= rect.Height;
                    cmb_Temp.Visible 
= true;
                }
                
else
                {
                    cmb_Temp.Visible 
= false;
                }
            }
            
catch
            {
            }
        }

        
// 当用户选择下拉列表框时改变DataGridView单元格的内容
        private void cmb_Temp_SelectedIndexChanged(object sender, EventArgs e)
        {
            
if (((ComboBox)sender).Text == "")
            {
                dgv_User.CurrentCell.Value 
= "";
                dgv_User.CurrentCell.Tag 
= "1";
            }
            
else
            {
                dgv_User.CurrentCell.Value 
= "";
                dgv_User.CurrentCell.Tag 
= "0";
            }
        }

        
// 滚动DataGridView时将下拉列表框设为不可见
        private void dgv_User_Scroll(object sender, ScrollEventArgs e)
        {
            
this.cmb_Temp.Visible = false;
        }

        
// 改变DataGridView列宽时将下拉列表框设为不可见
        private void dgv_User_ColumnWidthChanged(object sender, DataGridViewColumnEventArgs e)
        {
            
this.cmb_Temp.Visible = false;
        }

        
// 绑定数据表后将性别列中的每一单元格的Value和Tag属性(Tag为值文本,Value为显示文本)
        private void dgv_User_DataBindingComplete(object sender, DataGridViewBindingCompleteEventArgs e)
        {
            
for (int i = 0; i < this.dgv_User.Rows.Count; i++)
            {
                
if (dgv_User.Rows[i].Cells[2].Value != null && dgv_User.Rows[i].Cells[2].ColumnIndex == 2)
                {
                    dgv_User.Rows[i].Cells[
2].Tag = dgv_User.Rows[i].Cells[2].Value.ToString();
                    
if (dgv_User.Rows[i].Cells[2].Value.ToString() == "1")
                    {
                        dgv_User.Rows[i].Cells[
2].Value = "";
                    }
                    
else if (dgv_User.Rows[i].Cells[2].Value.ToString() == "0")
                    {
                        dgv_User.Rows[i].Cells[
2].Value = "";
                    }
                }
            }
        }
    }
}


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