ASP.NET CMS .NET content management system

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Last Modified: 7/11/2008

Related categories: Controls;

Article information
Article relates to	Sitefinity 3.x
Created by	Penka Ivanova
Last modified by	Rebecca

Problem
I cannot sort documents by title in the Download List control.

Solution
The Download List control does not support sorting on column click out of the box. To achieve this, you need to create your own control that extends the base one.

Here is what you need to do:

1. Create a copy of the original template (~/Sitefinity/ControlTemplates/Libraries/DownloadListTableModeTemplate.ascx) and modify the copy. You should replace the Literal controls in the repeater HeaderTemplate with LinkButton controls:

    
            <asp:Repeater ID="repeater" runat="server"> 
        
                <HeaderTemplate> 
        
                    <table class="sf_libraryGrid"> 
        
                        <thead> 
        
                        <tr> 
        
                            <th scope="col" id="TitleWrap" runat="server"><asp:LinkButton ID="btnName" runat="server" Text="<%$Resources:Title %>" CommandName="Name"></asp:LinkButton></th>

2. Create a class that derives from the DownloadList base class:

Set TableModeTemplatePath property to point to the new template in the CreateChildControls method
Implement a custom sorting in the repeater:

    
            protected override void SetItemHeaderContent(Control itemContainer, IContent contentItem) 
        
                    { 
        
                        base.SetItemHeaderContent(itemContainer, contentItem); 
        
                        LinkButton btn = itemContainer.FindControl("btnName") as LinkButton; 
        
                        if (btn != null) 
        
                            btn.Command += new CommandEventHandler(btn_Command); 
        
                    } 
        
                    void btn_Command(object sender, CommandEventArgs e) 
        
                    { 
        
                        this.SortData(e.CommandName); 
        
                    } 
        
                    void SortData(string sortExpression) 
        
                    { 
        
                        if (ViewState["SortOrder"] == null) 
        
                        { 
        
                            ViewState["SortOrder"] = " ASC"; 
        
                        } 
        
                        else if (ViewState["SortOrder"].ToString() == " ASC") 
        
                        { 
        
                            ViewState["SortOrder"] = " DESC"; 
        
                        } 
        
                        else 
        
                        { 
        
                            ViewState["SortOrder"] = " ASC"; 
        
                        } 
        
                        this.SortExpression = sortExpression + ViewState["SortOrder"]; 
        
                        this.ListContainer.RepeaterControl.DataBind(); 
        
                    }

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Sitefinity ASP.NET CMS - Content Management System

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