RadGrid GridHyperLinkColumn url data source

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Hello!

I try to create dynamic url like https://mylink.com/?parameter1={0}&parameter2={1}, but I can get only single parameter  from field DataNavigateUrlFields="myfield".

Any ideas?

After that, I tried to resolve my issue dynamically with code:

protected void OrdersRadGrid_ItemDataBound(object sender, GridItemEventArgs e)
        {
            if (e.Item is GridDataItem)
            {
                GridDataItem item = (GridDataItem)e.Item;

                TableCell tb = item["item1"];
                HyperLink lnk = new HyperLink();
                lnk.ID = "routeId";
                lnk.Text = item["item1"].Text;
                string str1 = item["item2"].Text;
                string str2 = item["item3"].Text;
                lnk.NavigateUrl = string.Format("https://mylink.com/?parameter={0}{1}", str1, str2);
                tb.Controls.Clear();
                tb.Controls.Add(lnk);

}

}

But, I get an interesting bug: in construction item["item"].Text not all fields displays correct. In debugger, i can see in the item all the fields with their correct values. But some of them (right these I need to use!), give me '&nbsp' value. Thus, expression siring str=item["item1"].Text returns me value '&nbsp' (not in all text type fields, but only in several in the same item). May it be encoding problem? Or any other ideas?