Passing multiple values in QueryString to a new page in ASP.NET

Question

I have looked for other solutions here on StackOverflow but i cant seem to figure it out. I have this linkbutton in a datagrid:

    <asp:LinkButton 
        ID="lnkname" runat="server"
        Text='<%#Eval("Titel") %>'
        PostBackUrl='<%#"Details.aspx?ID="+Eval("ID").toString()%>'
        CausesValidation="false">
    </asp:LinkButton>

and this is the paramater:

<asp:ControlParameter ControlID="txtTitel" DefaultValue="*" Name="Titel" 
PropertyName="Text" Type="String" ConvertEmptyStringToNull="False" />

I want to take the ID value to the next page : details.aspx but i get the following error:

Input string was not in a correct format. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.FormatException: Input string was not in a correct format.

I know it has something to do with ID being a INT but I cant figure out how to fix it.

NOTE: I do it in VB.NET

शेखर · Accepted Answer · 2013-04-09 09:00:49Z

2

There is problem in casting it to string

+Eval("ID").toString()

use this

PostBackUrl='<%# "Details.aspx?ID="+Eval("ID").ToString() %>'

The .toString() should be ToString()

Edit 1

Or you can use

Try using a HyperLinkField

http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.hyperlinkfield.aspx

<asp:HyperLinkField
                 HeaderText="Client IP"
                 DataNavigateUrlFields="IP"
                 DataNavigateUrlFormatString="Details.aspx?id={0}"
                 DataTextField="ID"
                 DataTextFormatString="{0}"/>

answered Apr 9, 2013 at 9:00

शेखर

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3 Comments

DiederikEEn Over a year ago

Shamefully I cant give you a rep+ as I am a starter @ stack overflow... But I thank you very much! Its working fine now. Thank you for your time, Kind regards

शेखर Over a year ago

kindly put your new html of asp link button

शेखर Over a year ago

You are welcome and there is nothing wrong for being starter :)

शेखर · Accepted Answer · 2013-04-10 12:08:17Z

0

If you need to pass multiple parameters then you can use & between them For example

PostBackUrl='<%# "Details.aspx?ID="+Eval("ID")+"&x=50" %>'

Important

Whenever you are concatenating(joining) a variable of any type like Eval("ID") value to a string like "Details.aspx?ID=", You do not need to write ToString() for casting becasue concatenation does this casting implicitly (automatically). I am sure about this behaviour for C# and VB.NET

So you could write simply

PostBackUrl='<%# "Details.aspx?ID="+Eval("ID") %>'

edited Apr 10, 2013 at 12:08

शेखर

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answered Apr 9, 2013 at 9:31

Sami

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