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Viewstate is not maintained for the inner controls if i used Enabled/disabled property in my server control

Posted on 2007-11-27
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Last Modified: 2013-12-16
Gurus,

I am developing a server control which is used as a custom tag in asp.net pages. Basically this server control will be acting as a container (but not actuallly) control to render other controls within this. For ex. If the logged in user has appropriate rights, this server control allows the child controls to render as visible or enabled based on the logged in user rights.

i have written a logic in this server control's Render event procedure. here is the sample code snippet

if(!isuserinrole())
{
foreach (Control ctl in this.Controls)
                {
                    ctl.EnableViewState = true;
                    DisableControl(ctl);
                  ctl.RenderControl(writer);                    
                }
}
private void DisableControl(Control control)
        {
            if (control is WebControl)
            {
                ((WebControl)control).EnableViewState = true; //((WebControl)control).Enabled = false;
                ((WebControl)control).Attributes.Add("disabled", "disabled");
            }
            else if (control is HtmlControl)
                ((HtmlControl)control).Attributes.Add("Disabled", "True");
        }

this is working fine for first time. if i do postback and come back to the page, i am loosing all data in textboxes. what is the problem? am i missing anything in viewstate maintanance? please advise me. Thanks for your help.

Ram.
if(!isuserinrole())
{
foreach (Control ctl in this.Controls)
                {
                    ctl.EnableViewState = true;
                    DisableControl(ctl);
                  ctl.RenderControl(writer);                    
                }
}
private void DisableControl(Control control)
        {
            if (control is WebControl)
            {
                ((WebControl)control).EnableViewState = true; //((WebControl)control).Enabled = false;
                ((WebControl)control).Attributes.Add("disabled", "disabled");
            }
            else if (control is HtmlControl)
                ((HtmlControl)control).Attributes.Add("Disabled", "True");
        }

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Question by:rampravee
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Author Comment

by:rampravee
ID: 20399204
I found the solution for this. Instead of checking this logic in Render method, i checked it in oninit event procedure to achieve the same.

it works fine.  it may be helpful for other users when they really need this functionality.
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Accepted Solution

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EE_AutoDeleter earned 0 total points
ID: 20968370
Cruthin,
Because you have presented a solution to your own problem which may be helpful to future searches, this question is now PAQed and your points have been refunded.

EE_AutoDeleter
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