This article describes how to implement multi-page selection in ASP.NET. Its specific ideas are simple: remember each selected item with hidden INPUT, check the saved value when the data binding is performed, and then displayed in the DataGrid. The complete code and examples of time:
View example
Selectmultipages.aspx
<% @ Page EnableViewState = "true" CodeBehind = "SelectMultiPages.aspx.cs" Language = "c #" AutoEventWireup = "false" Inherits = "eMeng.Exam.SelectMultiPages"%> Cross page implementation multi-selection </ title> <meta http-equiv =" content-type "content =" text / html; charSet = GB2312 " > <style> * {font-size: 12px} #status {text-align: left} </ style> <script language = "javascript"> Function addRemoveValues (Ochk) {// Need to pay attention to this place: The value you saved should be unique, so that the error will be replaced.</p>
<p>if (oChk.checked) SelectMultiPage.HdnSelectedValues.value = "," oChk.value; elseSelectMultiPage.HdnSelectedValues.value = SelectMultiPage.HdnSelectedValues.value.replace ( "," oChk.value, "");} </ script> </ HEAD> <BODY> <form id = "SelectMultiPage" runat = "server"> <asp: datagrid id = "DataGrid1" HorizontalAlign = "Center" AutoGenerateColumns = "False" Width = "600px" AllowPaging = "True "runat =" server "> <AlternatingItemStyle BackColor =" # EEEEEE "> </ AlternatingItemStyle> <HeaderStyle BackColor =" # AAAADD "Font-Bold =" True "HorizontalAlign =" Center "> </ HeaderStyle> <PagerStyle HorizontalAlign =" Right "Mode =" NumericPages "Visible =" True "> </ PagerStyle> <Columns> <asp: TemplateColumn HeaderText =" select "> <ItemTemplate> <input type =" checkbox "runat =" server "id =" chkSelect " οnclick = "addremovevalues (this)" value = '<% # databinder.eval (container.dataitem, "title")%>' /> </ itemtemplate> <asp: templateColumn> <ask: templatecolumn headertext = article title "> <Itemtemplate> <asp: literal text = '<% # databinder.eval (container.dat) AITEM, "TITLE"%> 'Runat = "Server" id = "titleshow" /> </ itemtemplate> </ ask: templateColumn> <ask: templateColumn headertext = "Published"> <itemtemplate> <ask: Literal Text = '<<</p>
<p>% # DataBinder.eval (Container.DataItem, "Createdate"). Tostring ()%> 'Runat = "Server" /> </ itemtemplate> </ asp: templateColumn> </ columns> </ ask: DataGrid> <DIV Align = center> <ask = "Button1" runat = "server" text = "get selected value> </ asp: button> <div id =" status "> <ask: label id =" label1 "Runat =" server "> </ asp: label> </ div> <input id =" hdnselectedvalues "type =" hidden "name =" hdnselectedVALUES "runat =" server "> </ div> </ form> </ Body> </ html> selectmultipages.aspx.cs</p>
<p>using System; using System.Collections; using System.ComponentModel; using System.Data; using System.Data.OleDb; using System.Drawing; using System.Web; using System.Web.SessionState; using System.Web.UI; using System.Web.ui.WebControls; use system.web.ui.htmlcontrols;</p>
<p>Summary description of Namespace Emeng.exam {/// <summary> /// selectmultipages. /// </ summary> public class SelectMultiPages: System.Web.UI.Page {protected System.Web.UI.WebControls.Button Button1; protected System.Web.UI.WebControls.Label Label1; protected System.Web.UI. HtmlControls.htmlinputhidden hdnselectedvalues; protected system.web.ui.webcontrols.dataGrid DataGrid1;</p>
<p>private void Page_Load (object sender, System.EventArgs e) {// Put user code to initialize the page here if BindData () (Page.IsPostBack!);} private void DataGrid1_PageIndexChanged (object source, DataGridPageChangedEventArgs e) {DataGrid1.CurrentPageIndex = E.NewpageIndex; binddata ();</p>
<p>void BindData () {OleDbConnection cn = new OleDbConnection ( "Provider = Microsoft.Jet.OLEDB.4.0; Data Source =" HttpContext.Current.Server.MapPath ( "aspx.mdb")); OleDbDataAdapter da = new OleDbDataAdapter ( " Select Title, CreateDate from Document ", cn); DataSet ds = new DataSet (); da.Fill (ds); DataGrid1.DataSource = ds; DataGrid1.DataBind ();} private void DataGrid1_ItemDataBound (object sender, System.Web. UI.WebControls.DataGriditeMeventargs e) {// Re-displays the selected item IF (E.Item.ItemType == ListItemType.Item || E.Item.itemType == ListItemType.AlternatingItem) {if (hdnselectedvalues.Value.indexof (LITERAL) E.Item.cells [1] .FindControl ("titleshow"))))))))))))))))))))))))))))))))))))))))))))))))))))). ); Chkselected.checked = true;}}} private void button1_click (object sender, system.eventargs e) {// for easy replacement of Label1.Text = hdnselexValues.Value.Replace (",", "<li > ");</p>
<p>#Region Web Form Designer Generated Code Override Protected Void OnNit (Eventargs E) {// // Codegen: This call is required for the ASP.NET Web Form Designer. // InitializeComponent (); base.oninit (e);</p>
<p>/// <summary> /// Designer supports the required method - do not use the code editor to modify the // / this method. /// </ summary> private void InitializeComponent () {this.DataGrid1.ItemDataBound = new System.Web.UI.WebControls.DataGridItemEventHandler (this.DataGrid1_ItemDataBound); this.DataGrid1.PageIndexChanged = new System.Web.UI. WebControls.DataGridPageChangedEventHandler (this.DataGrid1_PageIndexChanged); this.Button1.Click = new System.EventHandler (this.Button1_Click); this.Load = new System.EventHandler (this.Page_Load);</p>
<p>} #endregion</p>
<p>}</p></div><div class="text-center mt-3 text-grey">
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