我如何才能将一个控件中的文本框的值获取到另一个控件中

Question

I have 2 Controls - ProductInfo and Distribution.
On the Product Info Controls there are these text boxs - txtPrice, txtDate, txtFreq On the Distribution control, i would like to get the value of above text boxes. I tried :

BasePage.FindControl("txtPrice")

But it return null. Please help.

Thanks,

Answer 1

I would create properties in the ProductInfo control to expose the value of txtPrice, like this:

public decimal Price
{
    get { return Decimal.Parse(txtPrice.Text); }
}

And then in the other user control, try something like this:

ProductInfo prod = Page.FindControl("OtherUserControl") as ProductInfo;
if (prod != null)
{
    decimal price = prod.Price;
}

Recursive method

You may need to use recursion to find the ProductInfo control, and if you do something like this should work:

private Control FindControlRecursive(string controlID, Control parentCtrl)
{
    foreach (Control ctrl in parentCtrl.Controls)
    {
        if (ctrl.ID == controlID)
            return ctrl;
        FindControlRecursive(controlID, ctrl);
    }
    return null;
} 

Using FindControlRecursive :

ProductInfo prod = FindControlRecursive("OtherUserControl", Page) as ProductInfo;
if (prod != null)
{
    decimal price = prod.Price;
}