Hi,

Is it possible to access the properties of a templated control in a GridView, such as an image's height and width properties, so that from code (say a button click) you could dynamically size the image within the Gridview, (and refresh the .aspx page). I am using VB as my preffered language.

Thanks,

Tony

Sure you can. Depending on what you're trying to achieve, and where in the page's rendering state, you can do something like this:

Dim myImage As Image = CType(GridView1.Rows(0).FindControl("Image1"), Image)

This gets a reference to an Image called Image1 in the <ItemTemplate> of the GridView. The trick is to use FindControl for the right control and then cast it to the appropriate type using CType. This is also the way to access controls in, say a FormView....

You can then set the size of the image (or any other property) like this:

myImage.Width = New Unit(400)

HtH,

Imar
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Imar Spaanjaars
Everyone is unique, except for me.

Thanks Imar ... That is exactly what I am looking for, and it NEARLY solves the problem.

An added complication is that the Gridview I am trying to reference is held in a Formview, therefore I need a way to reference the Gridview ie) GridView1 in the first place.

Can I use a findcontrol and variable to get the GridView object, then substitute the variable in the second find control? eg)

Dim MyGrid as GridView = Ctype(Formview1.FindControl("GridView1"),GridView)

Then:

Dim myImage As Image = CType(MyGrid.Rows(0).FindControl("Image1"), Image)

Would this be the right syntax?

I'll try it anyway.

Thank again,

Tony

Imar,

As per my last post, I tried finding the Gridview first with FindControl, and substituting the resulting variable in the second findcontrol, and it worked perfectly.

:D

Thanks again,

Tony

Yes, that's exactly how you should do it. FindControl looks in the current "naming container" which limits the scope of the search operation.

This won't work:

Dim myImage as Image = Ctype(Formview1.FindControl("Image1"),Image)

because the image is not directly embedded in the FormView.

Your syntax to get a reference to the GridView and then use FindControl to find your image is the proper way to do it.

It may seem odd at first, but once you get the hang of it it actually starts making sense.....

Imar
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Imar Spaanjaars
Everyone is unique, except for me.

By the way: you can use the same technique to solve your problem from the other post you made on this site.

In the code behind, find the proper control and get its value. Then program against the SelectParameters collection (or a different collection) of your DataSource control and pass it the value dynamically.

HtH,

Imar
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Imar Spaanjaars
Everyone is unique, except for me.