asp.net GridView控件中模板列CheckBox全选、反选、取消

复制代码 代码如下:
using System;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public partial class Demo18 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (Page.IsPostBack == false)
{
BindData();
}
}

public void BindData()
{
string strSql = "select UserID,C_Name,E_Name,UpdataDate,isDY from Demo_User ";
DataTable dt = SqlHelper.ExecuteDataset(SqlHelper.CONN_STRING, CommandType.Text, strSql, null).Tables[0];

GridView.DataSource = dt;
GridView.DataKeyNames = new string[] { "UserID" };//主键
GridView.DataBind();
}

protected void GridView_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
GridView.PageIndex = e.NewPageIndex;
BindData();
}

protected void Button1_Click(object sender, EventArgs e)
{
CheckBoxAll.Checked = false;
CheckBox1.Checked = false;
for (int i = 0; i <= GridView.Rows.Count - 1; i++)
{
CheckBox CheckBox = (CheckBox)GridView.Rows[i].FindControl("CheckBox");
CheckBox.Checked = false;
}

}

protected void Button2_Click(object sender, EventArgs e)
{
for (int i = 0; i <= GridView.Rows.Count - 1; i++)
{
CheckBox CheckBox = (CheckBox)GridView.Rows[i].FindControl("CheckBox");
if (CheckBox.Checked == true)
{
string strSql = "Update Demo_User set UpdataDate=@UpdataDate where UserID=@UserID ";
SqlParameter[] para = {
new SqlParameter("@UpdataDate", DateTime.Now),
new SqlParameter("@UserID", GridView.DataKeys[i].Value),
};
SqlHelper.ExecuteNonQuery(SqlHelper.CONN_STRING, CommandType.Text, strSql, para);
}
}
CheckBoxAll.Checked = false;
CheckBox1.Checked = false;
BindData();

}

protected void CheckBoxAll_CheckedChanged(object sender, EventArgs e)
{
for (int i = 0; i <= GridView.Rows.Count - 1; i++)
{
CheckBox CheckBox = (CheckBox)GridView.Rows[i].FindControl("CheckBox");
if (CheckBoxAll.Checked == true)
{
CheckBox.Checked = true;
}
else
{
CheckBox.Checked = false;
}
}
CheckBox1.Checked = false;

}

protected void CheckBox1_CheckedChanged(object sender, EventArgs e)
{
for (int i = 0; i <= GridView.Rows.Count - 1; i++)
{
CheckBox CheckBox = (CheckBox)GridView.Rows[i].FindControl("CheckBox");
if (CheckBox.Checked == false)
{
CheckBox.Checked = true;
}
else
{
CheckBox.Checked = false;
}
}
CheckBoxAll.Checked = false;
}
}

GridView演示