首先新建一個Windows應用程序,將主窗體重命名爲MainForm,在MainForm中加入一個DataGridView控件,命名爲dgv_User。如下圖所示:
打開窗體代碼窗口,在代碼窗口中聲明一個ComboBox的控件
private ComboBox cmb_Temp = new ComboBox();
我們要綁定的下拉列表框的功能是選擇性別,添加如下綁定性別下拉列表框的方法
/// 綁定性別下拉列表框
/// </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] = "男";
dtSex.Rows.Add(drSex);
drSex = dtSex.NewRow();
drSex[0] = "0";
drSex[1] = "女";
dtSex.Rows.Add(drSex);
cmb_Temp.ValueMember = "Value";
cmb_Temp.DisplayMember = "Name";
cmb_Temp.DataSource = dtSex;
cmb_Temp.DropDownStyle = ComboBoxStyle.DropDownList;
}
通常情況下我們都是從數據庫中獲取數據表(或者數據集),然後綁定到DataGridView中的,這裏我們爲了避免連接數據庫,手中構造一個數據庫表,代碼如下:
{
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] = "張三";
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] = "趙六";
drData[2] = "1";
dtData.Rows.Add(drData);
this.dgv_User.DataSource = dtData;
}
爲窗體加載事件添加如下方法,其具體功能有詳細說明:
{
// 綁定性別下拉列表框
BindSex();
//綁定數據表
BindData();
// 設置下拉列表框不可見
cmb_Temp.Visible = false;
// 添加下拉列表框事件
cmb_Temp.SelectedIndexChanged += new EventHandler(cmb_Temp_SelectedIndexChanged);
// 將下拉列表框加入到DataGridView控件中
this.dgv_User.Controls.Add(cmb_Temp);
}
當用戶選擇的單元格移動到性別這一列時,我們要顯示下拉列表框,添加如下事件
{
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 = "男";
}
else
{
cmb_Temp.Text = "女";
}
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
{
}
}
當用戶選擇下拉列表框時改變DataGridView單元格的內容
{
if (((ComboBox)sender).Text == "男")
{
dgv_User.CurrentCell.Value = "男";
dgv_User.CurrentCell.Tag = "1";
}
else
{
dgv_User.CurrentCell.Value = "女";
dgv_User.CurrentCell.Tag = "0";
}
}
當滾動DataGridView或者改變DataGridView列寬時將下拉列表框設爲不可見
{
this.cmb_Temp.Visible = false;
}
private void dgv_User_ColumnWidthChanged(object sender, DataGridViewColumnEventArgs e)
{
this.cmb_Temp.Visible = false;
}
綁定數據表後將性別列中的每一單元格的Value和Tag屬性(Tag爲值文本,Value爲顯示文本)
{
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 = "男";
}
else if (dgv_User.Rows[i].Cells[2].Value.ToString() == "0")
{
dgv_User.Rows[i].Cells[2].Value = "女";
}
}
}
}
效果如下圖所示:
完整的代碼如下:
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
{
// 定義下拉列表框
private ComboBox cmb_Temp = new ComboBox();
public MainForm()
{
InitializeComponent();
}
/// <summary>
/// 綁定性別下拉列表框
/// </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] = "男";
dtSex.Rows.Add(drSex);
drSex = dtSex.NewRow();
drSex[0] = "0";
drSex[1] = "女";
dtSex.Rows.Add(drSex);
cmb_Temp.ValueMember = "Value";
cmb_Temp.DisplayMember = "Name";
cmb_Temp.DataSource = dtSex;
cmb_Temp.DropDownStyle = ComboBoxStyle.DropDownList;
}
/// <summary>
/// 爲避免連接數據庫,這裏手工構造數據表,實際應用中應從數據庫中獲取
/// </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] = "張三";
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] = "趙六";
drData[2] = "1";
dtData.Rows.Add(drData);
this.dgv_User.DataSource = dtData;
}
private void MainForm_Load(object sender, EventArgs e)
{
// 綁定性別下拉列表框
BindSex();
//綁定數據表
BindData();
// 設置下拉列表框不可見
cmb_Temp.Visible = false;
// 添加下拉列表框事件
cmb_Temp.SelectedIndexChanged += new EventHandler(cmb_Temp_SelectedIndexChanged);
// 將下拉列表框加入到DataGridView控件中
this.dgv_User.Controls.Add(cmb_Temp);
}
// 當用戶移動到性別這一列時單元格顯示下拉列表框
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 = "男";
}
else
{
cmb_Temp.Text = "女";
}
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
{
}
}
// 當用戶選擇下拉列表框時改變DataGridView單元格的內容
private void cmb_Temp_SelectedIndexChanged(object sender, EventArgs e)
{
if (((ComboBox)sender).Text == "男")
{
dgv_User.CurrentCell.Value = "男";
dgv_User.CurrentCell.Tag = "1";
}
else
{
dgv_User.CurrentCell.Value = "女";
dgv_User.CurrentCell.Tag = "0";
}
}
// 滾動DataGridView時將下拉列表框設爲不可見
private void dgv_User_Scroll(object sender, ScrollEventArgs e)
{
this.cmb_Temp.Visible = false;
}
// 改變DataGridView列寬時將下拉列表框設爲不可見
private void dgv_User_ColumnWidthChanged(object sender, DataGridViewColumnEventArgs e)
{
this.cmb_Temp.Visible = false;
}
// 綁定數據表後將性別列中的每一單元格的Value和Tag屬性(Tag爲值文本,Value爲顯示文本)
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 = "男";
}
else if (dgv_User.Rows[i].Cells[2].Value.ToString() == "0")
{
dgv_User.Rows[i].Cells[2].Value = "女";
}
}
}
}
}
}