DataGrid同时具有分页和排序功能及注意点
DataGrid同时具有分页和排序功能及注意点
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来源： 作者： 添加日期：2005-9-4 19:19:56 点击次数：
当DataGrid同时具有分页和排序功能时应注意在重新绑定数据源时，MyDataGrid.CurrentPageIndex=0;
下面给实现以上功能的原码，也就不多缀了aspx中包含有DataGrid和控制其数据源变化的dropdownlist
DataGrid代码
DataKeyField="ACC_NO" PagerStyle-Position="Bottom" PagerStyle-HorizontalAlign="Center" PagerStyle-Mode="NextPrev"
PageSize="10" AllowSorting="True" AllowPaging="True" CellPadding="4" Width="100%">
dropdownlist代码
aspx.cs文件代码核心如下：
private void Page_Load(object sender, System.EventArgs e)
{
if(!IsPostBack)
{
Session["WP"] ="0";
ddlWk_getS();
BindGrid();
}
}
private void ddlWk_getS()
{
switch (Session["WP"].ToString())
{
case "0":ddlWk.SelectedIndex=0;
break;
case "3":ddlWk.SelectedIndex=1;
break;
case "8":ddlWk.SelectedIndex=2;
break;
case "9":ddlWk.SelectedIndex=3;
break;
default:ddlWk.SelectedIndex=0;
break;
}
}
protected void BindGrid()
{
MyDataGrid.DataSource=GetData().
Tables["vCO"].DefaultView;
MyDataGrid.DataBind();
//COUNT.Text=MyDataGrid.Columns.Count.ToString();
}
///
/// 返回Data
///
///
private DataSet GetData()
{
string strConn=(String) ((NameValueCollection) Context.GetConfig("system.web/database"))["strConn"];
using (SqlConnection conn = new SqlConnection(strConn))
{
SqlCommand cmd = new SqlCommand("sp_C",conn);
https://www.360docs.net/doc/7b14389570.html,mandType=CommandType.StoredProcedure;
cmd.Parameters.Add("@place",SqlDbType.VarChar,2);
cmd.Parameters["@place"].Value=Session["WP"].ToString();
conn.Open();
SqlDataAdapter da = new SqlDataAdapter();
da.SelectCommand=cmd;
DataSet ds=new DataSet();
da.Fill(ds,"vCO");
Count.Text="ヒット："+ds.Tables["vCO"].Rows.Count.ToString()+"件";
return ds;
}
}
///
///从DataSet中除一
///
///
///
protected void MyDataGrid_Delete(Object sender, DataGridCommandEventArgs E)
{
String strID=MyDataGrid.DataKeys[(int)E.Item.ItemIndex].ToString();
//删除操作
}
///
/// 分页操作
///
///
///
protected void MyDataGrid_PageIndexChanged(object source, DataGridPageChangedEventArgs e)
{
MyDataGrid.CurrentPageIndex=e.NewPageIndex;
BindGrid();
}
///
/// 排序
///
///
///
protected void Sort_Grid(object sender, DataGridSortCommandEventArgs e)
{
DataView dv= new DataView(GetData().Tables["vCO"]);
dv.Sort= e.SortExpression.ToString();
MyDataGrid.DataSource=dv;
MyDataGrid.DataBind();
}
#region Web override protected void OnInit(EventArgs e)
{
// //
InitializeComponent();
base.OnInit(e);
}
///
private void InitializeComponent()
{
this.ddlWk.SelectedIndexChanged += new System.EventHandler(this.ddlWk_SelectedIndexChanged);
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
private void ddlWk_SelectedIndexChanged(object sender, System.EventArgs e)
{
Session["WP"]=ddlWk.SelectedValue;
MyDataGrid.CurrentPageIndex=0;//没有这一句，当该页码超出其他数据源的范围时会出错
BindGrid();
Response.Write( "");
}