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image ImageUrl

Posted on 2008-10-17
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Last Modified: 2012-05-05
Dim Image1 As New Image
        Image1.ID = "Image1"
        Image1.ImageUrl = "~\phonelist\Photos\camera.gif"
        Image1.Visible = True

            <asp:Image ID="Image1"  Visible="True" runat="server" />


I trying to do this in VB but the src keep coming up blank. I could do this on the front end but I need to make this dynamic for other reason. But why nothing appears in the src, that is a mystery to me.
<img id="ctl00_Attendance1_Repeater1_ctl00_Image1" src="" style="border-width:0px;" />

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Question by:sevensnake77
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Expert Comment

by:the_bachelor
ID: 22741617
First of all if the image is already defined on your page (you already have: <asp:Image ID="Image1"  Visible="True" runat="server" /> )
Why are you declaring a new image in the code behind? (Dim Image1 as new Image)

You could just do Me.Image1.ImageUrl = "~\phonelist\Photos\camera.gif"
Now it seem like your image control is in a repeater so you might wanna watch out for how you handle that...
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Expert Comment

by:TechTiger007
ID: 22741754
Are you adding the control to the page
below code works good for me

Image img = new Image();
        img.ImageUrl = "file.jpg";
        Page.Controls.Add(img);
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Author Comment

by:sevensnake77
ID: 22741881
Object reference not set to an instance of an object.Object reference not set to an instance of an object.  Description:  An unhandled exception occurred during the execution of the current web  request. Please review the stack trace for more information about the error and  where it originated in the code.

Exception Details:  System.NullReferenceException: Object reference not set to an instance of an  object.

Source Error:

    Line 18:  Line 19:  Line 20:         Me.Image1.ImageUrl = "~\phonelist\Photos\camera.gif" Line 21:         Image1.Visible = True Line 22:         Page.Controls.Add(Image1)

Me.Image1.ImageUrl = "~\phonelist\Photos\camera.gif"

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by:sevensnake77
ID: 22741964
Its because it is in a repeater thats why. How can i get this to work inside the repeater
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Expert Comment

by:TechTiger007
ID: 22742487
dim img as Image = Page.FindControl("image1")  ' you may need to type cast the control to Image here
        img.ImageUrl = "image.jpg";
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by:sevensnake77
ID: 22742596
Nope still Object reference not set to an instance of an object.Object reference not set to an instance of an object.  Description:  An unhandled exception occurred during the execution of the current web  request. Please review the stack trace for more information about the error and  where it originated in the code.
only when its in the repeater.
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Accepted Solution

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TechTiger007 earned 500 total points
ID: 22742718
try this
Image img = (Image)repeatercontrol.Items[i].FindControl("image1");
img.ImageUrl = "image.jpg";
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by:sevensnake77
ID: 22742837
Sorry nothing either if you create a repeater and test it you will see.
Dim img As Image = Page.FindControl("image1")  ' you may need to type cast the control to Image here
        img.ImageUrl = "~\phonelist\Photos\camera.gif"

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