accessing image control from codebehind

Question

Compiler Error Message: CS0030: Cannot convert type 'System.Web.UI.Control' to 'System.Web.UI.WebControls.ImageField'

Line 107:    protected void BookListView_DataBinding(object sender, EventArgs e)
Line 108:    {
Line 109:        ImageField img = (ImageField)BookListView.FindControlR("Image1");
Line 110:        if (img.ImageUrl == "")
Line 111:            img.ImageUrl = "Snoimage.gif";

the control is find but ...

error occured in line 109

FindControlR is an extension to find the control

the control is located in a listview

<asp:Image ID="Image1" runat="server" ImageUrl='<%# Eval("Pic_Address") %>' />

Answer 1

You're trying to cast an Image control to an ImageField control.

Try modifying your code slightly:

Image img = (Image)BookListView.FindControlR("Image1");