I'm writing a control to my aspx file from the aspx.cs file. Why am I getting this error when attempting to use the control?

Question

I have an empty HTML div in my aspx file:

<div id="containingDiv" runat="server">
</div>

My aspx.cs file is writing some HTML to the aspx file like this...

containingDiv.InnerHtml = "<uc:myControl runat='server' id='thisControl'/>";

Later in my aspx.cs file, the control is being acted on... sorry to be vague here but I'm not entirely clear about what it's doing I just know it's being used...

thisControl.somePropertyOrAction....

And I'm getting this error:

The name 'thisControl' does not exist in the current context.

Any ideas why? Many thanks.

Answer 1

您可以按ID在aspx.cs文件中使用和使用它。

Answer 2

I think you need to find the control in your html when you run the "being acted on".

Try something like this:

var control = containingDiv.FindControl("thisControl");
control.somePropertyOrAction = ...

Answer 3

This is how you load user controls dynamically in ASP.NET:

protected void Page_Load(object sender, EventArgs e)
{
    myControl control = LoadControl("~/myControl.ascx") as myControl;
    containingDiv.Controls.Add(control);
}