using asp.net Datalist

post your code for datalist first (aspx)...

I am new to Experts Exchange.
Do I post Code Here, in the comment area ???

the response "asp.net get gridview datakey from row command" is not valid... I am using a Datalist NOT A Gridview

yes, here comment area... first press "CODE" button above text area, and paste code inside

[ CODE ] ...paste code here ... [ / CODE ]

            <asp:DataList ID="DataList2" runat="server" BackColor="Gray" BorderColor="#666666"
                BorderStyle="None" BorderWidth="2px" CellPadding="3" CellSpacing="2"
                Font-Names="Verdana" Font-Size="Small" GridLines="Both" RepeatColumns="11" RepeatDirection="Horizontal"
                Width="600px" DataSourceID="MySQL1" DataKeyField="id"
               
                >

                <FooterStyle BackColor="#F7DFB5" ForeColor="#8C4510" />

                <HeaderStyle BackColor="#333333" Font-Bold="True" Font-Size="Large" ForeColor="White"
                    HorizontalAlign="Center" VerticalAlign="Middle" />

                <HeaderTemplate>
                    Videos
                </HeaderTemplate>

                <ItemStyle BackColor="White" ForeColor="Black" BorderWidth="2px" />

                <ItemTemplate>

                    <b></b>
                    <asp:LinkButton ID="LinkButton1" runat="server" PostBackUrl='<%# getWebSite(Eval("filename")) %>' ><%# Eval("filename") %></asp:LinkButton>

                    <b>Category:</b>
                    <asp:Label ID="lblName" runat="server" Text='<%# Eval("catagory") %>'></asp:Label>
                    <br />

                </ItemTemplate>

            </asp:DataList>

			Code Behind:
    Function getWebSite(str As String) As String
        getWebSite = "~/videos/golf/" & str
    End Function

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Result:
405 - HTTP verb used to access this page is not allowed.
The page you are looking for cannot be displayed because an invalid method (HTTP verb) was used to attempt access.

I' have been looking for a work around since searches are of no help with this error.

The following works great for a Gridview:
        url = "~/videos/golf/" & FindFileName(strValue)
        Dim WinParams As String = "left=100,top=100,width=" & WindowWidth & ",height=" & WindowHeight & ",toolbar=1,resizable=1"
        ResponseHelper.Redirect(url, "_Blank", WinParams)

This is the ultimate goal but with a "Datalist Control"
Thanks

use

PostBackUrl='<%# Server.MapPath("~/videos/golf/") & Eval("filename") %>'

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The site runs everything under HTTPS.
I get a warning about the page not being secure. But opened anyway(my site).

returns:
"The address wasn’t understood"

The URL: "c:\WWW\Videos\golf\Athletic%20Game.mp4"
The URL is accurate.

Server is win 2012 R2

oops, use

ResolveUrl

PostBackUrl='<%# ResolveUrl("~/videos/golf/") & Eval("filename") %>'

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is this working fine?

PostBackUrl='<%# "~/videos/golf/" & Eval("filename") %>'

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No Change.

Trying something different.
I tried a PostBackUrl of "https://bing.com" and got a blank page.
But, when I pressed "Enter" on the "https://bing.com" url bar, it went to "https://www.bing.com" and opened normally.

Could this be an issue with the "Control" ???

Thank You very much.
Now I will be able to move on to the original goal.

That worked.
using "<a href='<%# getWebSite(Eval("filename")) %>' target="_blank"><%# Eval("filename") %></a>"

But I had to change, (in code behind):

From
getWebSite = "~/videos/golf/" & str

To
 getWebSite = "../videos/golf/" & str

What I really wanted to do is get the width and height of the video so I could resize the Browser window to fit the Video height and width.
Thanks again

I got muddled down with the "Gridview" thinking because this was the first time I was using the "DataList" control. I knew they were different and was making it entirely to difficult.

Big Thanks to Huseyin