public static string ExecuteCallbackMethod(Control control, Dictionary <string, object> callInfo)
{
string methodName = (string)callInfo["name"];
object[] args = (object[])callInfo["args"];
string clientState = (string)callInfo["state"];
// Attempt to load the client state
IClientStateManager csm = control as IClientStateManager;
if (csm != null && csm.SupportsClientState)
{
csm.LoadClientState(clientState);
}
// call the method
object result = null;
Dictionary <string, object> error = null;
Type controlType = control.GetType();
try
{
// Find a matching static or instance method. Only public methods can be invoked
MethodInfo mi = controlType.GetMethod(methodName, BindingFlags.Public | BindingFlags.Static | BindingFlags.Instance);
if (mi == null)
{
throw new MissingMethodException(controlType.FullName, methodName);
}
// Verify that the method has the corrent number of parameters as well as the ScriptControlMethodAttribute
ParameterInfo[] methodParams = mi.GetParameters();
ScriptControlMethodAttribute methAttr = (ScriptControlMethodAttribute)Attribute.GetCustomAttribute(mi, typeof(ScriptControlMethodAttribute));
if (methAttr == null || !methAttr.IsScriptMethod || args.Length != methodParams.Length)
{
throw new MissingMethodException(controlType.FullName, methodName);
}
// Convert each argument to the parameter type if possible
// NOTE: I'd rather have the ObjectConverter from within Microsoft.Web.Script.Serialization namespace for this
object[] targetArgs = new object[args.Length];
for (int i = 0; i < targetArgs.Length; i++)
{
if (args[i] == null)
{
continue;
}
targetArgs[i] = JSONSerializerExecute.DeserializeObject(args[i], methodParams[i].ParameterType);
}
result = mi.Invoke(control, targetArgs);
}
catch (Exception ex)
{
// Catch the exception information to relay back to the client
if (ex is TargetInvocationException)
{
ex = ex.InnerException;
}
error = new Dictionary <string, object>();
error["name"] = ex.GetType().FullName;
error["message"] = ex.Message;
if (WebUtility.AllowResponseExceptionStackTrace())
{
error["stackTrace"] = ex.StackTrace;
}
else
{
error["stackTrace"] = string.Empty;
}
TryWriteLog(ex, control);
}
// return the result
Dictionary <string, object> resultInfo = new Dictionary <string, object>();
if (error == null)
{
resultInfo["result"] = result;
if (csm != null && csm.SupportsClientState)
{
resultInfo["state"] = csm.SaveClientState();
}
}
else
{
resultInfo["error"] = error;
}
// Serialize the result info into JSON
return(JSONSerializerExecute.Serialize(resultInfo));
}
