Make Datalist items link-able in asp.net_问答_开发者

Make Datalist items link-able in asp.net

开发者 https://www.devze.com 2023-04-04 07:49 出处：网络

I want to make Datalist with linkable items that I can Navigate to开发者_C百科 specific url when i click on it it go to c# do respond to new URL

My Urls aren't constant

how?

you should edit the item template of the DataList and put an ASP HyperLink inside, and you use data binding to assign the NavigateUrl to such control.

something like this:

<asp:DataList ID="listSearchResults" Border="1" BorderColor="Black"
    RepeatDirect="Horizontal" RepeatColumns="5" runat="server" >
    <ItemTemplate>

     <asp:HyperLink ID="HyperLink1" runat="server" NavigateUrl='<%# Eval("Url") %>' Text='<%# Eval("Name") %>' />

    </ItemTemplate>
</asp:DataList>

another approach is to use ASP:LinkButton and assign CommandName and CommandArgument properties to that control.

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs"   Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org   /TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Datalist with linkable items</title>
  </head>
  <body>
<form id="form1" runat="server">
<div align="center">
    <asp:DataList ID="dlLinkable" runat="server" 
        onitemdatabound="dlLinkable_ItemDataBound" >
        <ItemTemplate>
            <table style="width: 300px;" cellpadding="0" cellspacing="1">
                <tr>
                    <td style="width:200px">
                        <asp:Label ID="lblName" runat="server" Text="Label"></asp:Label>
                    </td>
                    <td>
                        <a id="linkA" runat="server">link</a>
                    </td>
                </tr>
            </table>
        </ItemTemplate>
    </asp:DataList>
</div>
</form>
</body>
</html>

using System;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
public partial class _Default : System.Web.UI.Page
{
DataTable dt;
protected void Page_Load(object sender, EventArgs e)
{
    populateDataList();
}
private void populateDataList()
{
    dt = new DataTable();
    //Create 3 columns for this DataTable
    DataColumn col1 = new DataColumn("ID");
    DataColumn col2 = new DataColumn("Name");
    DataColumn col3 = new DataColumn("Url");
    //Add All These Columns into DataTable table
    dt.Columns.Add(col1);
    dt.Columns.Add(col2);
    dt.Columns.Add(col3);
    // Create a Row in the DataTable table
    DataRow row = dt.NewRow();
    row[col1] = 1;
    row[col2] = "google";
    row[col3] = "http://www.google.com";
    dt.Rows.Add(row);
    //////////////////////
    row = dt.NewRow();
    row[col1] = 2;
    row[col2] = "yahoo";
    row[col3] = "http://www.yahoo.com";
    dt.Rows.Add(row);
    //////////////////////////////////
    dlLinkable.DataSource = dt;
    dlLinkable.DataBind();
}
  protected void dlLinkable_ItemDataBound(object sender, DataListItemEventArgs e)
{
    if (e.Item.ItemType == ListItemType.AlternatingItem || e.Item.ItemType ==   ListItemType.Item)
     {
        Label lblName = (Label)e.Item.FindControl("lblName");
        if (lblName != null)
        {
            lblName.Text = dt.Rows[e.Item.ItemIndex]["Name"].ToString();
        }
        HtmlAnchor linkA = (HtmlAnchor)e.Item.FindControl("linkA");
        if (linkA != null)
        {
            linkA.HRef = dt.Rows[e.Item.ItemIndex]["Url"].ToString();
        }
    }
  }

}