asp.net cs variable in aspx page

Question

Need some help please. I've got an aspx page with an iframe and I'm trying to pass a variable called 'pageId' from my code behind to it. I've looked at various examples on SO and other sites and most suggest to others its a databinding issue and I've followed through some of the examples. Perhaps I can't use a variable like the way Im trying to do in an iframe?

I've introduced the get/set and public properties, but just a little lost. Anyone help point me in the right diection please?

aspx page

<iframe width="690" height="600" src="https://myserver.com/Index.php?pageId=<%=pageId%>" frameborder="0" scrolling="yes" style="border-width: 0px;"></iframe>

aspx.cs page

protected String pageId { get; set; }

//private string pageId;
//public String pageId { get {return pageId; } }

protected void Page_Load(object sender, EventArgs e)
{
    string pageId = 'Y2840'; //this is generated from my db and I know the data is being stored in here as I have Response.Write(pageId)   
}

What is the error you are encountering? Or what is not happening? — Tejs
– Tejs, Commented Mar 28, 2013 at 16:13
Im not hetting an error as such, but myserver.com/Index.php does not display the value of pageId. Its like there is nothing in there, but when I response write there is — JK36
– JK36, Commented Mar 28, 2013 at 16:16
is the iframe inside a FormView? otherwise might be easier to set an id on the iframe and set the src in code-behind. — Constanta
– Constanta, Commented Mar 28, 2013 at 16:18
The iframe is within the standard form tags? I'll look into FormView — JK36
– JK36, Commented Mar 28, 2013 at 16:20

James Lawruk · Accepted Answer · 2013-03-28 16:25:55Z

2

Your private variable and public property have the same name. Try using a capital P in your property name. Also don't declare a new variable pageId in Page_Load. PageId is blank because you are setting the local Page_Load method variable, and not the class level variable.

private string pageId;
public string PageId { get {return pageId; } }

protected void Page_Load(object sender, EventArgs e)
{
    pageId = 'Y2840';  
}

In your aspx page:

<%=PageId%>

edited Mar 28, 2013 at 16:25

answered Mar 28, 2013 at 16:19

James Lawruk

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2 Comments

James Lawruk Over a year ago

Weird, so did you remove string from the Page_Load method?

JK36 Over a year ago

If I just add <%=PageId%> to my aspx page the variable is displaying out. However its not passing through to my server in the iframe. I think I'll try the formview method. Ooh So close.

Constanta · Accepted Answer · 2013-03-28 16:21:34Z

0

method 1.

<iframe runat="server" id="myiframe" width="690" height="600"      
frameborder="0" scrolling="yes"     style="border-width: 0px;"></iframe>

code-behind:

myiframe.src="https://myserver.com/Index.php?pageId=" + pageId;

method 2.

put iframe in formview and give it a datasource. Then use your existing code.

answered Mar 28, 2013 at 16:21

Constanta

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