How to diable the anchor used in Grid View at runtime

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Hi,

I am using GridView in asp.net using C# in which placed an anchor in the first column in with an image so once clicked the image it goes to the other pag.
I need to validate this, if not the logged in uses has access to edit the anchor, anchor should be disabled that is click event should be happen,

I tried this way to get the property of the anchor in row databound, but this is not working.

My code as fallows

if (e.Row.RowType == DataControlRowType.DataRow)
{
//Condition for access
HtmlAnchor hreft = (HtmlAnchor)e.Row.FindControl("btnedit");
hreft .Disabled = true;

XML

<a  href='<%# Eval("Testing", "testing.aspx?ID={0}") %>' id="btnedit">
                                            <img src="Images/edit.png" alt="View" border="0px" /></a>

At debugging I am just getting the null value,

Can any one find me where I went wrong...

Thanks in advance

Posted 18-Mar-11 20:39pm

sathya4260

Updated 19-Mar-11 0:16am

Dalek Dave

v2

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Dalek Dave 19-Mar-11 6:17am

Edited for Grammar and Readability.

^That's Aragon 19-Mar-11 8:17am

I have just found one spelling mistake in the subject line. How to "Disable" NOT "Diable".

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^That's **Aragon** · Answer 1 · 2011-03-18T21:05:00

Solution 1

You can assign the href attribute dynamically. Something like below.

if (e.Row.RowType == DataControlRowType.DataRow)
{
//Condition for access
HtmlAnchor hreft = (HtmlAnchor)e.Row.FindControl("btnedit");
if(IsUserLogin)
{
hreft.HRef = assign URL
}
else
{
hreft.HRef = "javascript:void(0);";
}
}

Hope it helps.

Posted 18-Mar-11 21:05pm

^That's Aragon

Comments

sathya4260 19-Mar-11 3:28am

hi dude
when i use hreft.HRef="javascript:void(0);";

I am getting error as "Object not set to instance."

Can U provide me an solutions

^That's Aragon 19-Mar-11 3:35am

This error ("Object not set to instance.") only occurs when the object is null.Make sure that you get the HtmlAnchor before its usage. Like place a null checking condition before the if(IsUserLogin) like if(hreft!=null). Hope it helps.

sathya4260 19-Mar-11 3:46am

every time for hreft i am getting null value only...

^That's Aragon 19-Mar-11 3:57am

oops.. you have not make it runat="server". For using any control server side, you need to apply that attribute.

sathya4260 19-Mar-11 4:28am

yes now i am getting the value in hreft, but after loading the page, when i click on the link it just shows error Void(0) no value in it, but while debugging the value of hreft.HRef is giving me the correct url

^That's Aragon 19-Mar-11 5:28am

you need to remove href='<%# Eval("Testing", "testing.aspx?ID={0}") %>' from your aspx code as it will be placed in the code behind.In my example "Assign URL", you can write your required url expression. Hope it helps.

Dalek Dave 19-Mar-11 6:17am

Fair enough.