C#2005中使用控件DataGridView实现对数据库增删改查操作

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Data.SqlClient;

using System.Drawing;

using System.Text;

using System.Windows.Forms;

namespace DataSource

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

private DataSet ds = new DataSet();

private SqlConnection conn = null;

private SqlDataAdapter da = null;

private const string DRIVER = "server=.;database=northwind;uid=sa;pwd=sa";

private const string sql_select = "select * from region";

/**//**

* 此方法为将数据库northwind中的region表的数据查询出来并放入DataSet中

**/

private void Form1_Load(object sender, EventArgs e)

{

conn = new SqlConnection(DRIVER);

da = new SqlDataAdapter(sql_select,conn);

da.Fill(ds,"table");

this.dataGridView1.DataSource = ds.Tables["table"].DefaultView;

}

private bool BtnInsert() //此方法作用于添加

{

da.InsertCommand = conn.CreateCommand();

da.InsertCommand.CommandText = "insert into region(id,ption) values(@id,@ption)";

da.InsertCommand.Parameters.Add("@id", SqlDbType.Int, 4, "regionid");

da.InsertCommand.Parameters.Add("@ption", SqlDbType.VarChar, 10, "regiondescription");

int count = da.Update(ds);

bool result = count > 0 ? true : false;

return result;

}

private void button1_Click(object sender, EventArgs e)

{

if (this.BtnInsert())//调用此方法

{

MessageBox.Show("添加成功!");

}

else

{

MessageBox.Show("添加失败!");

}

}

private bool BtnDelect() //此方法作用于删除

{

SqlParameter para = new SqlParameter();

da.DeleteCommand = conn.CreateCommand();

da.DeleteCommand.CommandText = "delete from region where regionid=@id";

para = da.DeleteCommand.Parameters.Add("@id", SqlDbType.Int, 4, "regionid");

para .SourceVersion = DataRowVersion.Original; //获取原始值

ds.Tables["table"].Rows[this.dataGridView1.CurrentRow.Index].Delete();

int count = da.Update(ds);

bool result = count > 0 ? true : false;

return result;

}

private void button2_Click(object sender, EventArgs e)

{

if (this.BtnDelect())//调用删除方法

{

MessageBox.Show("删除成功!");

}

else

{

MessageBox.Show("删除失败!");

}

}

private bool BtnUpdate() //此方法作用于修改

{

SqlParameter para = new SqlParameter();

da.UpdateCommand = conn.CreateCommand();

da.UpdateCommand.CommandText = "update region set regionid=@id,regiondescription=@ption where regionid=@oldid";

da.UpdateCommand.Parameters.Add("@id", SqlDbType.Int, 4, "regionid");

da.UpdateCommand.Parameters.Add("@ption", SqlDbType.VarChar, 10, "regiondescription");

para = da.UpdateCommand.Parameters.Add("@oldid", SqlDbType.Int, 4, "regionid");

para .SourceVersion = DataRowVersion.Original;

int count = da.Update(ds);

bool result = count > 0 ? true : false;

return result;

}

private void button3_Click(object sender, EventArgs e)

{

if (this.BtnUpdate())//调用修改方法

{

MessageBox.Show("修改成功!");

}

else

{

MessageBox.Show("修改失败!");

}

}

}

}