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Question about ObjectDataSourc e.DataObjectTyp eName

It's serious.

This is my interface:
public interface IData
Guid UserId { get; set; }
string IDataType { get; }

and my class:
public class StudentData : IData
private Guid userId = Guid.Empty;
public Guid UserId { ... }

private string name = "";
public string Name { ... }

private int age = 0;
public int Age { ... }

and the data provider
public class FormViewDataPro vider
... // Codes to get the data

public void Set(IData i) // Update Method

now if i copy all the codes into a windows application and call it like the

StudentData s = new StudentData();
FormViewDataPro vider fvdp = new FormViewDataPro vider();

it'll work well

but if i use ObjectDataProvi der and FormView and set ObjectDataProvi der's
property ObjectDataTypeN ame = StudentData, when i update the FormView it'll
throw an exception:

ObjectDataSourc e 'ObjectDataSour ce2' could not find a non-generic method
'Set' that takes parameters of type 'StudentData'.

could somebody help me?

Stack Trace:

[InvalidOperatio nException: ObjectDataSourc e 'ObjectDataSour ce2' could not
find a non-generic method 'Set' that takes parameters of type 'StudentData'.]
System.Web.UI.W ebControls.Obje ctDataSourceVie w.GetResolvedMe thodData(Type
type, String methodName, Type dataObjectType, Object oldDataObject, Object
newDataObject, DataSourceOpera tion operation) +664
System.Web.UI.W ebControls.Obje ctDataSourceVie w.ExecuteUpdate (IDictionary
keys, IDictionary values, IDictionary oldValues) +1512
System.Web.UI.D ataSourceView.U pdate(IDictiona ry keys, IDictionary values,
IDictionary oldValues, DataSourceViewO perationCallbac k callback) +179
System.Web.UI.W ebControls.Form View.HandleUpda te(String commandArg,
Boolean causesValidatio n) +1187
System.Web.UI.W ebControls.Form View.HandleEven t(EventArgs e, Boolean
causesValidatio n, String validationGroup ) +851
System.Web.UI.W ebControls.Form View.OnBubbleEv ent(Object source, EventArgs
e) +163
System.Web.UI.C ontrol.RaiseBub bleEvent(Object source, EventArgs args) +56
System.Web.UI.W ebControls.Form ViewRow.OnBubbl eEvent(Object source,
EventArgs e) +118
System.Web.UI.C ontrol.RaiseBub bleEvent(Object source, EventArgs args) +56
System.Web.UI.W ebControls.Link Button.OnComman d(CommandEventA rgs e) +107
System.Web.UI.W ebControls.Link Button.RaisePos tBackEvent(Stri ng
eventArgument) +165

System.Web.UI.W ebControls.Link Button.System.W eb.UI.IPostBack EventHandler.Ra isePostBackEven t(String eventArgument) +31
System.Web.UI.P age.RaisePostBa ckEvent(IPostBa ckEventHandler
sourceControl, String eventArgument) +32
System.Web.UI.P age.RaisePostBa ckEvent(NameVal ueCollection postData) +244
System.Web.UI.P age.ProcessRequ estMain(Boolean
includeStagesBe foreAsyncPoint, Boolean includeStagesAf terAsyncPoint) +3871

Good good study, day day up...
Nov 19 '05 #1
0 1329

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