Dear All,
I am using asp.net2.0, C#, sql2005 using Visual studio 2005
Let Me explain the scenario I have checkboxlist containg 15 field. Based on no of checked field . I created dropdownlistbox and label dynamically through loop and assign id as dropdownlist + no of iteration. Now my question is how I access these control as when I am accessing one of the control I am getting nullobjectrefer ence error stating “Object reference not set to an instance of an object.”
I created control as
Foreach(listite m)
{
//…….
Label label = new Label();
DropDownList dropdownlist = new DropDownList();
//assinging id
label.ID = "label" + i.ToString() ;
dropdownlist.ID = "dropdownli st" + i.ToString() ;
}
And I am accessing it through
cmd.Parameters. Add("@para1", SqlDbType.VarCh ar).Value = Page.FindContro l("label1").ToS tring() ;
cmd.Parameters. Add("@value1", SqlDbType.VarCh ar).Value = Page.FindContro l("dropdownlist 1").ToString ();
and my second question is how do i access selected value in dropdownlist1(d ynamically created control) Please guide me
Thanks
4 1492
Dear All,
I am using asp.net2.0, C#, sql2005 using Visual studio 2005
Let Me explain the scenario I have checkboxlist containg 15 field. Based on no of checked field . I created dropdownlistbox and label dynamically through loop and assign id as dropdownlist + no of iteration. Now my question is how I access these control as when I am accessing one of the control I am getting nullobjectrefer ence error stating “Object reference not set to an instance of an object.”
I created control as
Foreach(listite m)
{
//…….
Label label = new Label();
DropDownList dropdownlist = new DropDownList();
//assinging id
label.ID = "label" + i.ToString() ;
dropdownlist.ID = "dropdownli st" + i.ToString() ;
}
And I am accessing it through
cmd.Parameters. Add("@para1", SqlDbType.VarCh ar).Value = Page.FindContro l("label1").ToS tring() ;
cmd.Parameters. Add("@value1", SqlDbType.VarCh ar).Value = Page.FindContro l("dropdownlist 1").ToString ();
and my second question is how do i access selected value in dropdownlist1(d ynamically created control) Please guide me
Thanks
Hi
u r declare the label and Drop down in loop so when loop is over object scop is also over. if u declare label and dropdown out of loop with array then it will help u.
Hello sir ! can u provide me with the code for creating a text box control array when a button is clicked ?
TRScheel 638
Recognized Expert Contributor
Hello sir ! can u provide me with the code for creating a text box control array when a button is clicked ?
What solutions have you tried? Have you considered a hidden frame that is visible once the button is clicked, then disposed of when no longer needed?
TRScheel 638
Recognized Expert Contributor
my second question is how do i access selected value in dropdownlist1(d ynamically created control) [/b] Please guide me
Thanks
You need to cast the found control to the proper type. - ((DropDownList)Page.FindControl("MyDropDownList"))
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