SqlDataSource ControlParamete r from DetailsView dropdownlist

[K B]

Hi,

I've tried this several ways but get the error that the control can't be
found.

I have a details view with a dropdownlist in the EditItemTemplat e
populated and assigned the selected value in code.

I need to get the selected value when the record is saved. I've tried
using the following in the SqlDataSource updating event:

Dim sWF As String = (CType(dvAddPro cess.FindContro l("ddlWfEdit" ),
DropDownList)). SelectedValue
e.Command.Param eters("@WorkFlo wDoc").Value = sWF

I've also tried adding a ControlParamete r to the SqlDataSource Update
parameters list:

<asp:ControlPar ameter ControlID="dvAd dProcess$ddlWfE dit" Type="string"
Name="WorkFlowD oc" PropertyName="S electedValue" />

Could anyone tell me where I'm going wrong?

thanks,
KB
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[Shawn Wildermuth]

Hello K,

The problem most likely is that the FindControl doesn't do a good job of
going down a hierarchy until it finds the control. I use this little utility
function to find FormView controls (sorry for the C#, but hopefully you can
convert it):

public static Control FindControl(Con trol parent, string id)
{
if (parent != null && parent.Controls != null && parent.Controls .Count
!= 0)
{

Control ctrl = parent.FindCont rol(id);
if (ctrl != null)
{
return ctrl;
}
else
{
foreach (Control subCtrl in parent.Controls )
{
ctrl = FindControl(sub Ctrl, id);
if (ctrl != null) return ctrl;
}
}
}

return null;
}
Thanks,
Shawn Wildermuth
Speaker, Author and C# MVP

Hi,

I've tried this several ways but get the error that the control can't
be found.

I have a details view with a dropdownlist in the EditItemTemplat e
populated and assigned the selected value in code.

I need to get the selected value when the record is saved. I've tried
using the following in the SqlDataSource updating event:

Dim sWF As String = (CType(dvAddPro cess.FindContro l("ddlWfEdit" ),
DropDownList)). SelectedValue
e.Command.Param eters("@WorkFlo wDoc").Value = sWF

I've also tried adding a ControlParamete r to the SqlDataSource Update
parameters list:

<asp:ControlPar ameter ControlID="dvAd dProcess$ddlWfE dit" Type="string"
Name="WorkFlowD oc" PropertyName="S electedValue" />

Could anyone tell me where I'm going wrong?

thanks,
KB
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[K B]

Shawn,

It's a little over my head to see where I apply this. Any ideas why I
can't use the ControlParemete r because that way I can specify the
control name AND the parent control? But it isn't found.

<asp:ControlPar ameter ControlID="dvAd dProcess$ddlWfI nsert" Type="string"
Name="WorkFlowD oc" PropertyName="S electedValue" />

Thanks for responding!

K

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[Shawn Wildermuth]

Hello K,

As far as I know, this doesn't work because it can't parse the dvAddProcess$dd lWfInsert
to figure out what you mean is the ddlWfInsert control inside the DetailsView.
So you need to do it on the DataSource's Selecting event.
Thanks,
Shawn Wildermuth
Speaker, Author and C# MVP

Shawn,

It's a little over my head to see where I apply this. Any ideas why I
can't use the ControlParemete r because that way I can specify the
control name AND the parent control? But it isn't found.

<asp:ControlPar ameter ControlID="dvAd dProcess$ddlWfI nsert"
Type="string" Name="WorkFlowD oc" PropertyName="S electedValue" />

Thanks for responding!

K

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