using System;
using System.Collections;
using System.Reflection;
+using System.Text;
namespace System.Web.UI
{
sealed class CollectionBuilder : ControlBuilder
{
- Type elementType;
+ Type[] possibleElementTypes;
internal CollectionBuilder ()
{
public override void AppendLiteralString (string s)
{
- if (s != null && s.Trim () != "")
+ if (s != null && s.Trim ().Length > 0)
throw new HttpException ("Literal content not allowed for " + ControlType);
}
public override Type GetChildControlType (string tagName, IDictionary attribs)
{
Type t = Root.GetChildControlType (tagName, attribs);
- if (elementType != null && !elementType.IsAssignableFrom (t))
- throw new HttpException ("Cannot add a " + t + " to " + elementType);
+ if (possibleElementTypes != null) {
+ bool foundMatchingType = false;
+ for (int i = 0; i < possibleElementTypes.Length && !foundMatchingType; ++i)
+ foundMatchingType = possibleElementTypes[i].IsAssignableFrom (t);
+
+ if (!foundMatchingType) {
+ StringBuilder possibleTypesString = new StringBuilder ();
+ for (int i = 0; i < possibleElementTypes.Length; i++) {
+ if (i != 0)
+ possibleTypesString.Append (", ");
+ possibleTypesString.Append (possibleElementTypes[i]);
+ }
+ throw new HttpException ("Cannot add a " + t + " to " + possibleTypesString);
+ }
+ }
return t;
}
string tagName,
string id,
IDictionary attribs)
- {
+ {
base.Init (parser, parentBuilder, type, tagName, id, attribs);
- PropertyInfo prop = parentBuilder.ControlType.GetProperty (tagName, flagsNoCase);
+ PropertyInfo prop = parentBuilder.ControlType.GetProperty (tagName, FlagsNoCase);
SetControlType (prop.PropertyType);
- prop = ControlType.GetProperty ("Item", flagsNoCase & ~BindingFlags.IgnoreCase);
- elementType = prop.PropertyType;
+ MemberInfo[] mems = ControlType.GetMember ("Item", MemberTypes.Property, FlagsNoCase & ~BindingFlags.IgnoreCase);
+ if (mems.Length > 0) {
+ possibleElementTypes = new Type [mems.Length];
+ for (int i = 0; i < mems.Length; ++i)
+ possibleElementTypes [i] = ((PropertyInfo)mems [i]).PropertyType;
+ } else
+ throw new HttpException ("Collection of type '" + ControlType + "' does not have an indexer.");
}
}
}