因为之前有个CSDN的账号但是后来账号丢了，于是只能另起炉灶，今天总有找回了丢失已久的登录秘密，不知道有没有办法将两个博客合并，只能手动复制黏贴以前的博文过来。。。悲惨
源地址：http://blog.csdn.net/sxfenglei/article/details/5431181 该博客不再用了
现在看看当年写的代码 真幼稚呵呵 转过来纪念下当年的稚嫩，哈哈
/// <summary>
/// Page.Load 加载时 使用!IsPostBack 判断是否回显
/// </summary>
if (!IsPostBack)// !IsPostBack 获取一个值，该值指示该页是否正为响应客户端回发而加载，或者它是否正被首次加载和访问
//==================================连接数据库 增删改查==================================
/// <summary>
/// 在 web.config中配置数据库字符串
/// </summary>
<appSettings>
<add key="ConnectionString" value="Data Source=ASUS/SQLEXPRESS;Initial Catalog=MyDB;Integrated Security=True"/>
</appSettings>
/// <summary>
/// 获取 Web.Config 配置文件中与数据库连接的字符串
/// </summary>
public SqlConnection GetConnection()
{
string sqlconString = ConfigurationManager.AppSettings["ConnectionString"].ToString();
SqlConnection con = new SqlConnection(sqlconString);
return con;
}
/// <summary>
/// 编写 填充方法
/// </summary>
private void fillDataGridView()
{
//将方法赋值给con 等同于SqlConnection con = new SqlConnection(sqlconString);
SqlConnection con = GetConnection();
con.Open();
//拼SQL语句
string sql = "select * from yuanGong";
//创建 Command
SqlCommand com = new SqlCommand(sql, con);
//创建 DataAdapter
SqlDataAdapter dataAdapter = new SqlDataAdapter(com);
//创建 DataSet
DataSet dataSet = new DataSet();
//填充 DataSet
dataAdapter.Fill(dataSet);
//填充 GridView 控件
GridView1.DataSource = dataSet;
//将数据绑定到 GridView 控件
GridView1.DataBind();
//释放资源
dataAdapter.Dispose();
dataSet.Dispose();
con.Close();
}
/// <summary>
/// 按照条件查询数据
/// </summary>
//如果文本框不为空(进行查询) 如果文本框为空(填充所有数据)
if(this.TextBox1.Text!="")
{
//创建 Connection 对象
SqlConnection con = GetConnection();
con.Open();
//拼SQL
string sql = "select * from yuanGong where name=@name";
//创建 Command 对象
SqlCommand com = new SqlCommand(sql,con);
//
com.Parameters.Add("@name", SqlDbType.VarChar, 20).Value = this.TextBox1.Text.Trim();
//创建 DataAdapter 对象
SqlDataAdapter dataAdpater = new SqlDataAdapter(com);
//创建 DataSet 对象
DataSet dataSet = new DataSet();
//填充 dataSet
dataAdpater.Fill(dataSet);
//判断是否查到数据
if (dataSet.Tables[0].Rows.Count > 0)
{
//填充 GridView
GridView1.DataSource = dataSet;
//绑定数据到 GridView
GridView1.DataBind();
}
else
{
Response.Write("<script>alert('报告冯磊老大，没有相关记录！')</script>");
}
//释放资源占用
dataAdpater.Dispose();
dataSet.Dispose();
con.Close();
}else{
this.fillDataGridView();//调用自定义方法 填充所有数据
}
/// <summary>添加数据
/// 添加数据
/// </summary>
if(TextBox1.Text.Trim()!="")
{
SqlConnection con = GetConnection();
string sql = "insert into yuanGong (Name) values ( '"+this.TextBox1.Text.Trim()+" ')";//特别声明：‘this.TextBox1.Text.Trim()’ 应放在单引号中
SqlCommand com = new SqlCommand(sql,con);
con.Open();
com.ExecuteNonQuery();
con.Close();
this.fillDataGridView();
}else{
this.fillDataGridView();
}
/// <summary>修改数据
/// 编辑
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
{
//
GridView1.EditIndex = e.NewEditIndex;
//重新加载 GridView
this.fillDataGridView();
}
/// <summary>更新 按键 GridView RowUpdating 方法
/// 更新
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
//拿到值
int id = Convert.ToInt32(GridView1.DataKeys[e.RowIndex].Value.ToString());
string name = ((TextBox)(GridView1.Rows[e.RowIndex].Cells[2].Controls[0])).Text.ToString();
string age = ((TextBox)(GridView1.Rows[e.RowIndex].Cells[3].Controls[0])).Text.ToString();
string gongZi = ((TextBox)(GridView1.Rows[e.RowIndex].Cells[5].Controls[0])).Text.ToString();
string jiGuan = ((TextBox)(GridView1.Rows[e.RowIndex].Cells[7].Controls[0])).Text.ToString();
//拼SQL
string sql = string.Format("update yuanGong set Name='{0}',Age='{1}',gongZi='{2}',jiGuan='{3}' where ID='{4}'", name,age,gongZi,jiGuan,id);
//创建 connection 对象
SqlConnection con = GetConnection();
//打开数据库连接
con.Open();
//创建 command 对象
SqlCommand com = new SqlCommand(sql,con);
//执行SQL
com.ExecuteNonQuery();
//释放资源
com.Dispose();
con.Close();
//
GridView1.EditIndex = -1;
//重新加载 GridView
this.fillDataGridView();
}
/// <summary>取消按键 GridView 的 RowCancelingEdit 方法
/// 取消
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
{
GridView1.EditIndex = -1;
//重新加载 GridView
this.fillDataGridView();
}
/// <summary>删除数据
/// 删除数据
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
//拿到 ID
int id = Convert.ToInt32(GridView1.DataKeys[e.RowIndex].Value.ToString());
//拼SQL
string sqlStr = "delete from yuanGong where ID=" + id;
SqlConnection myConn = GetConnection();
myConn.Open();
SqlCommand myCmd = new SqlCommand(sqlStr, myConn);
myCmd.ExecuteNonQuery();
myCmd.Dispose();
myConn.Close();
GridView1.EditIndex = -1;
this.fillDataGridView();
}
/// <summary>弹出窗口询问是否删除
/// 弹出窗口询问是否删除
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
//
if (e.Row.RowType == DataControlRowType.DataRow)
{
((LinkButton)e.Row.Cells[0].Controls[0]).Attributes.Add("onclick", "return confirm('冯磊老大你确定要删除我吗?')");
}
}