给DataGridView添加右键菜单
本人以前用PB做过一些开发，挺喜欢DATAWINDOW的。在学习C＃时发现给DataGirdView加上右键菜单的效果和PB中的DATAWINDOW有相同的效果。其中数据库的操作应用的SQLDataAdatper，下面源码奉上，欢迎朋友们提出指正和意见。
首先，先建立一个Form窗口取名为DataGridViewDemo 从工具箱中选择控件，并设置属性如下
DataGridView name属性 dataGridView
TextBox name属性 txtContent
Button name属性 btSave Text 属性 保存
Button name 属性 btExit Text属性 退出
DataGridViewDemo 类代码如下
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 C15Demo
{
public partial class DataGridViewDemo : Form
{
//全局变量
private SqlDataAdapter adapter = null;
private DataTable dt = null;
public DataGridViewDemo()
{
InitializeComponent();
}
///
/// 初始化SQLDataAdapter类添加对数据表的增删改操作
///
private void InitAdapter()
{
SqlConnection connection = new SqlConnection();
connection.ConnectionString = "Persist Security Info=false;Integrated Security=SSPI;Initial Catalog=Northwind;server=(local)";
adapter = new SqlDataAdapter("select ProductID,ProductName,UnitPrice,Discontinued from Products", connection);
adapter.FillLoadOption = LoadOption.OverwriteChanges;
//添加修改命令
SqlCommand UpdataCommand = new SqlCommand();
UpdataCommand.Connection = connection;
UpdataCommand.CommandText = "Update Products set ProductName = @ProductName,UnitPrice=@UnitPrice,Discontinued = @Discontinued where ProductID=@Productid ";
UpdataCommand.Parameters.Add("@ProductID", SqlDbType.Int, 4, "ProductID");
UpdataCommand.Parameters.Add("@ProductName", SqlDbType.VarChar, 50, "ProductName");
UpdataCommand.Parameters.Add("@UnitPrice", SqlDbType.Money, 20, "UnitPrice");
UpdataCommand.Parameters.Add("@Discontinued", SqlDbType.Bit, 1, "Discontinued");
adapter.UpdateCommand = UpdataCommand;
//添加新增
SqlCommand InsertCommand = new SqlCommand();
InsertCommand.Connection = connection;
InsertCommand.CommandText = "Insert into Products (ProductName,UnitPrice,Discontinued)values(@ProductName,@UnitPrice,@Discontinued) ";
InsertCommand.Parameters.Add("@ProductName", SqlDbType.VarChar, 50, "ProductName");
InsertCommand.Parameters.Add("@UnitPrice", SqlDbType.Money, 20, "UnitPrice");
InsertCommand.Parameters.Add("@Discontinued", SqlDbType.Bit, 1, "Discontinued");
adapter.InsertCommand = InsertCommand;
//添加删除
SqlCommand DeleteCommand = new SqlCommand();
DeleteCommand.Connection = connection;
DeleteCommand.CommandText = "Delete Products where ProductID=@ProductID ";
DeleteCommand.Parameters.Add("@ProductID", SqlDbType.Int, 4, "ProductID");
adapter.DeleteCommand = DeleteCommand;
}
///
/// 初始化DataGridView并绑定列，给DataGridView添加右键菜单
///
/// DataGrivView控件
private void InitDataGridView(DataGridView dataGridView)
{
dataGridView.AutoGenerateColumns = false;
dataGridView.AllowUserToAddRows = false ;
dataGridView.AllowUserToDeleteRows = false ;
dataGridView.ColumnHeadersHeightSizeMode = DataGridViewColumnHeadersHeightSizeMode.AutoSize;
dataGridView.EditMode = DataGridViewEditMode.EditOnEnter;
dataGridView.MultiSelect = false;
dataGridView.ScrollBars = ScrollBars.Vertical;
dataGridView.VirtualMode = true;
//添加列
DataGridViewTextBoxColumn Column1 = new DataGridViewTextBoxColumn();
Column1.DataPropertyName = "ProductID";
Column1.HeaderText = "产品 ID";
Column1.Name = "Column1";
//Column1.ReadOnly = true;
DataGridViewTextBoxColumn Column2 = new DataGridViewTextBoxColumn();
Column2.DataPropertyName = "ProductName";
Column2.HeaderText = "产品名称";
Column2.Name = "Column2";
Column2.Width = 165;
DataGridViewTextBoxColumn Column3 = new DataGridViewTextBoxColumn();
Column3.DataPropertyName = "UnitPrice";
Column3.HeaderText = "价格";
Column3.Name = "Column3";
DataGridViewCheckBoxColumn Column4 = new DataGridViewCheckBoxColumn();
Column4.DataPropertyName = "Discontinued";
Column4.HeaderText = "是否使用";
Column4.Name = "Column4";
dataGridView.Columns.AddRange(new System.Windows.Forms.DataGridViewColumn[] { Column1, Column2, Column3 ,Column4 });
//添加右键菜单
ContextMenuStrip contextMenuStrip = new ContextMenuStrip();
contextMenuStrip.ShowCheckMargin = false;
contextMenuStrip.ShowImageMargin = false;
contextMenuStrip.ShowItemToolTips = true;
contextMenuStrip.TextDirection = ToolStripTextDirection.Horizontal;
contextMenuStrip.Opening += new CancelEventHandler(contextMenuStrip_Opening);
dataGridView.ContextMenuStrip = contextMenuStrip;
dataGridView.CurrentCellChanged += new EventHandler(dataGridView_CurrentCellChanged);
}
///
/// 右键菜单委拖的Opening事件
///
///
///
void contextMenuStrip_Opening(object sender, CancelEventArgs e)
{
//throw new NotImplementedException();
ContextMenuStrip contextMenuStrip = sender as ContextMenuStrip;
if (contextMenuStrip != null)
{
//判断是否有菜单项，如果没有就添加
if (contextMenuStrip.Items.Count == 0)
{
ToolStripMenuItem addMenuItem = new ToolStripMenuItem();
addMenuItem.Text = "添加";
//addMenuItem.ImageIndex = 0 //添加图片
//将菜单单击事件委托
addMenuItem.Click += new EventHandler(addMenuItem_Click);
ToolStripMenuItem deleteMenuItem = new ToolStripMenuItem();
deleteMenuItem.Text = "删除";
deleteMenuItem.Click += new EventHandler(deleteMenuItem_Click);
ToolStripMenuItem insertMenuItem = new ToolStripMenuItem();
insertMenuItem.Text = "插入";
insertMenuItem.Click += new EventHandler(insertMenuItem_Click);
contextMenuStrip.Items.Add(addMenuItem);
contextMenuStrip.Items.Add(deleteMenuItem);
contextMenuStrip.Items.Add(insertMenuItem);
}
}
}
///
/// 插入菜单的委拖事件
///
///
///
void insertMenuItem_Click(object sender, EventArgs e)
{
//throw new NotImplementedException();
//throw new NotImplementedException();
ToolStripMenuItem toolStripMenuItem = sender as ToolStripMenuItem;
ContextMenuStrip contextMenuStrip = toolStripMenuItem.Owner as ContextMenuStrip;
if (contextMenuStrip != null)
{
//获取目标控件
DataGridView dataGridView = contextMenuStrip.SourceControl as DataGridView;
if (dataGridView.CurrentRow.Index > 0)
{
//因为不能直接在dataGridView1上添加一个空行，所以给dt数据源添加一个空行然后重新绑定
DataRow dr = dt.NewRow ();
dt.Rows.InsertAt (dr,dataGridView.CurrentRow.Index );
dataGridView.DataSource = dt;
}
}
}
void deleteMenuItem_Click(object sender, EventArgs e)
{
//throw new NotImplementedException();
ToolStripMenuItem toolStripMenuItem = sender as ToolStripMenuItem;
ContextMenuStrip contextMenuStrip = toolStripMenuItem.Owner as ContextMenuStrip;
if (contextMenuStrip != null)
{
//获取目标控件
DataGridView dataGridView = contextMenuStrip.SourceControl as DataGridView;
if (dataGridView.CurrentRow.Index > 0)
{
dataGridView.Rows.RemoveAt(dataGridView.CurrentRow.Index);
}
}
}
///
/// 添加菜单的委拖事件
///
///
///
void addMenuItem_Click(object sender, EventArgs e)
{
//throw new NotImplementedException();
ToolStripMenuItem toolStripMenuItem = sender as ToolStripMenuItem;
ContextMenuStrip contextMenuStrip = toolStripMenuItem.Owner as ContextMenuStrip;
if (contextMenuStrip != null)
{
//获取目标控件
DataGridView dataGridView = contextMenuStrip.SourceControl as DataGridView;
//dataGridView.Rows.Add();
//因为不能直接在dataGridView1上添加一个空行，所以给dt数据源添加一个空行然后重新绑定
DataRow dr = dt.NewRow();
dt.Rows.Add(dr);
dataGridView.DataSource = dt;
}
}
///
/// 删除菜单的委拖事件
///
///
///
void dataGridView_CurrentCellChanged(object sender, EventArgs e)
{
//throw new NotImplementedException();
if (this.dataGridView1.CurrentCell != null)
{
this.txtContent.Text = this.dataGridView1.CurrentCell.Value.ToString();
}
}
///
/// 保存按钮的单击事件
///
///
///
private void btnSave_Click(object sender, EventArgs e)
{
try
{
adapter.Update(dt);
MessageBox.Show("更新成功！");
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
///
/// 窗口控件加载事件
///
///
///
private void DataGridViewDemo_Load(object sender, EventArgs e)
{
//初始化Adapter全局变量
this.InitAdapter();
//初始化dataGridView1控件
this.InitDataGridView(dataGridView1);
dt = new DataTable();
try
{
//获取数据并填充到DataTable
adapter.Fill(dt);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
//给dataGridView1控件绑定数据源
this.dataGridView1.DataSource = dt;
}
}
}