creating web controls with in a table which is created in click event of an imagebutton

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i can't provide all the code this is the piece of code where i'm getting the below error;

C#

TextBox tb=new TextBox();
tb.ID="Name";
row.controls.Add(tb);
// here i want check for validation as Mandatory i.e. RequiredFieldValidator 
RequiredFieldValidator rfv1= new RequiredFieldValidator();
rfv1.ControlToValidate="tb";

im getting an error as unable to find the webcontrol "tb" which is defined "ControlToValidate" property of.........

plz any one understands my problem plz help me out

Posted 20-Oct-11 18:55pm

sandhya.T 2011

Updated 20-Oct-11 20:09pm

Mehdi Gholam

v2

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Abhinav S · Answer 1 · 2011-10-20T19:02:00

Solution 1

Try using the Id inside ControlToValidate (instead of the control name itself).

Posted 20-Oct-11 19:02pm

Abhinav S

Comments

sandhya.T 2011 21-Oct-11 1:35am

i have tried but its giving an error as "web controls are created with in a form tag using runat="server"

but i can't able to write the stmt as
tb.runat="server";
getting a red under the "runat" like(the textbox class cannot have the defined as a method or property)

Zubair Alie · Answer 2 · 2011-10-20T20:03:00

Solution 2

you are adding textbox control to row but what about requiredFieldValidator?
i think it should also be added. and secondly, as Abhinav said, use textbox id instead of object you created...

C#

row.controls.add(tb);
RequiredFieldValidator rfv1= new RequiredFieldValidator();
row.controls.add(rfv1);
rfv1.ControlToValidate= tb.ID;

Posted 20-Oct-11 20:03pm

Zubair Alie

Comments

sandhya.T 2011 21-Oct-11 2:29am

yes i have added that after the definition of RFV and ControlTovalidate property stmts

k thanq so much i will check for that one also
and more question??????
how to add the items to DropDownList control at runtime
which one is used DataTextField or else ListItem class object?

sandhya.T 2011 22-Oct-11 1:16am

i got the control To validate stmt executing but
im getting an error that
"textbox_id of type textbox must be placed in aform tag with runat=server"

sandhya.T 2011 22-Oct-11 1:17am

Plz help me out of this problem