作者：jiankunking 出处：http://blog.csdn.net/jiankunking
今天在开发过程中遇到了一个很恶心的问题，就是Form窗体ShowDialog的时候，直接报出下面的错误：
有关调用实时(JIT)调试而不是此对话框的详细信息， 请参见此消息的结尾。 ************** 异常文本 ************** System.MissingMethodException: 找不到方法:“XXX.XXX.DataObject.SPI.DataObjectColumn[] XXX.XXX.WCFClient.WCFService.ServiceClient.DataColumn_GetListByDOID(System.String)”。 在 XXX.XXX.Common.CommonHelp.UI.HelpForm.HelpDisplayEditorForm_Load(Object sender, EventArgs e) 在 System.Windows.Forms.Form.OnLoad(EventArgs e) 在 System.Windows.Forms.Form.OnCreateControl() 在 System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible) 在 System.Windows.Forms.Control.CreateControl() 在 System.Windows.Forms.Control.WmShowWindow(Message& m) 在 System.Windows.Forms.Control.WndProc(Message& m) 在 System.Windows.Forms.ScrollableControl.WndProc(Message& m) 在 System.Windows.Forms.Form.WmShowWindow(Message& m) 在 System.Windows.Forms.Form.WndProc(Message& m) 在 System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m) 在 System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m) 在 System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
将断点加在HelpDisplayEditorForm_Load函数上发现，根本进不到函数内部，就报错了。
个人认为是Form窗体在ShowDialog函数之后，HelpDisplayEditorForm_Load函数之前发生的异常，于是上网搜资料，看微软的源码，也没什么收获。于是，咨询了一下同事，同事说把HelpDisplayEditorForm_Load中的所有代码屏蔽掉，看看效果。
我把HelpDisplayEditorForm_Load内所有代码屏蔽到以后，断点可以进入HelpDisplayEditorForm_Load函数内部了，然后，一部分一部分代码的放开，发现，只要到需要调用服务端方法的时候，就会报出上面的错误（所有调用WCF服务端方法的地方都会报错）。
更新过错误提示的dll（通过dll反编译发现错误提示的函数在dll中是存在的），重启过iis等等N过方法之后，还有木有搞定。
由于，是所有WCF服务端方法均不可用，于是回头研究WCF客户端，发现WCF客户端有问题，有人在获取WCF服务端方法的时候，WCF将服务契约标识方法入参中的自定义类型、返回值是自定义类型的，均隐式进行了实体类序列化（此处的序列化指的是，将自定义类型的实体，标识成了WCF数据契约的类型）。
比如SPI中的实体类如下：
using System.Data;
namespace XXXX.XXXX.Common.CommonHelp.SPI
{
/// <summary>
/// 智能帮助数据实体类
/// 对应数据库：[A_CommonHelp]
/// </summary>
public class CommonHelpDataEntity
{
/// <summary>
/// HelpEntity 是一个指针 标明该CommonHelpDataEntity属于哪一个CommonHelpEntity
/// </summary>
private CommonHelpEntity entity;
public CommonHelpEntity HelpEntity
{
get { return entity; }
}
private string displayColumns;
/// <summary>
/// 显示字段
/// </summary>
public string DisplayColumns
{
get { return displayColumns; }
set { displayColumns = value; }
}
private string sourceObject;
/// <summary>
/// 源SQL语句
/// </summary>
public string SourceObject
{
get { return sourceObject; }
set { sourceObject = value; }
}
private string dataTextField;
/// <summary>
/// 绑定Text字段
/// </summary>
public string DataTextField
{
get { return dataTextField; }
set { dataTextField = value; }
}
private string dataValueField;
/// <summary>
/// 绑定Value字段
/// </summary>
public string DataValueField
{
get { return dataValueField; }
set { dataValueField = value; }
}
private string orderFields;
/// <summary>
/// 默认排序字段
/// </summary>
public string OrderFields
{
get { return orderFields; }
set { orderFields = value; }
}
public string rowId;
/// <summary>
/// 标志字段
/// </summary>
public string RowId
{
get { return rowId; }
set { rowId = value; }
}
private string defaultValueCondition;
/// <summary>
/// 默认值条件
/// </summary>
public string DefaultValueCondition
{
get { return defaultValueCondition; }
set { defaultValueCondition = value; }
}
private string category;
/// <summary>
/// 帮助类别
/// </summary>
public string Category
{
get { return category; }
set { category = value; }
}
private string selectDataObjectId;
/// <summary>
/// 搜索引擎类型帮助勾选的数据对象的Id
/// </summary>
public string SelectDataObjectId
{
get { return selectDataObjectId; }
set { selectDataObjectId = value; }
}
private string searchEngineId;
/// <summary>
/// 搜索引擎帮助A_SearchEngine ID
/// </summary>
public string SearchEngineId
{
get { return searchEngineId; }
set { searchEngineId = value; }
}
private string dataModeldId;
/// <summary>
/// 数据模型Id
/// </summary>
public string DataModeldId
{
get { return dataModeldId; }
set { dataModeldId = value; }
}
private string createTime;
/// <summary>
/// 帮助创建时间
/// </summary>
public string CreateTime
{
get { return createTime; }
set { createTime = value; }
}
private string lastUpdateTime;
/// <summary>
/// 帮助 最后更新时间
/// </summary>
public string LastUpdateTime
{
get { return lastUpdateTime; }
set { lastUpdateTime = value; }
}
public CommonHelpDataEntity()
{
entity = new CommonHelpEntity();
entity.SetDataEntity(this);
}
public CommonHelpDataEntity(CommonHelpEntity info)
{
entity = info;
entity.SetDataEntity(this);
}
public CommonHelpDataEntity(DataRow row)
{
entity=new CommonHelpEntity();
entity.Id = row["Id"].ToString();
entity.Code = row["Code"].ToString();
entity.Name = row["Name"].ToString();
entity.Contains = row["DisplayColumns"].ToString();
entity.SetDataEntity(this);
this.DisplayColumns = row["DisplayColumns"].ToString();
this.SourceObject = row["SourceObject"].ToString();
this.DataTextField = row["DataTextField"].ToString();
this.DataValueField = row["DataValueField"].ToString();
this.OrderFields = row["OrderFields"].ToString();
this.RowId = row["Id"].ToString();
//int value=(row["Category"].ToString().Trim().Length==0)?0:int.Parse(row["Category"].ToString());
//this.Category = Enum.GetName(typeof(HelpTypeEnum), value);
this.Category = row["Category"].ToString();
this.SearchEngineId = row["SearchEngineId"].ToString();
this.SelectDataObjectId = row["SelectDataObjectId"].ToString();
this.DefaultValueCondition = row["DefaultValueCondition"].ToString();
this.CreateTime = row["CreateTime"].ToString();
this.lastUpdateTime = row["lastUpdateTime"].ToString();
this.dataModeldId = row["DataModeldId"].ToString();
}
/// <summary>
/// 关联数据实体
/// </summary>
/// <param name="entity"></param>
public void AssociateHelpEntity(CommonHelpEntity entity)
{
entity.SetDataEntity(this);
this.entity = entity;
}
}
}
标识序列化之后的类的为：
[System.Diagnostics.DebuggerStepThroughAttribute()]
[System.CodeDom.Compiler.GeneratedCodeAttribute("System.Runtime.Serialization", "4.0.0.0")]
[System.Runtime.Serialization.DataContractAttribute(Name="CommonHelpDataEntity", Namespace="http://schemas.datacontract.org/2004/07/XXXX.XXXX.Common.CommonHelp.SPI")]
[System.SerializableAttribute()]
public partial class CommonHelpDataEntity : object, System.Runtime.Serialization.IExtensibleDataObject, System.ComponentModel.INotifyPropertyChanged {
[System.NonSerializedAttribute()]
private System.Runtime.Serialization.ExtensionDataObject extensionDataField;
[System.Runtime.Serialization.OptionalFieldAttribute()]
private string CategoryField;
[System.Runtime.Serialization.OptionalFieldAttribute()]
private string CreateTimeField;
[System.Runtime.Serialization.OptionalFieldAttribute()]
private string DataTextFieldField;
[System.Runtime.Serialization.OptionalFieldAttribute()]
private string DataValueFieldField;
[System.Runtime.Serialization.OptionalFieldAttribute()]
private string DefaultValueConditionField;
[System.Runtime.Serialization.OptionalFieldAttribute()]
private string DisplayColumnsField;
[System.Runtime.Serialization.OptionalFieldAttribute()]
private string LastUpdateTimeField;
[System.Runtime.Serialization.OptionalFieldAttribute()]
private string OrderFieldsField;
[System.Runtime.Serialization.OptionalFieldAttribute()]
private string RowIdField;
[System.Runtime.Serialization.OptionalFieldAttribute()]
private string SearchEngineIdField;
[System.Runtime.Serialization.OptionalFieldAttribute()]
private string SelectDataObjectIdField;
[System.Runtime.Serialization.OptionalFieldAttribute()]
private string SourceObjectField;
[System.Runtime.Serialization.OptionalFieldAttribute()]
private string rowId1Field;
[global::System.ComponentModel.BrowsableAttribute(false)]
public System.Runtime.Serialization.ExtensionDataObject ExtensionData {
get {
return this.extensionDataField;
}
set {
this.extensionDataField = value;
}
}
[System.Runtime.Serialization.DataMemberAttribute()]
public string Category {
get {
return this.CategoryField;
}
set {
if ((object.ReferenceEquals(this.CategoryField, value) != true)) {
this.CategoryField = value;
this.RaisePropertyChanged("Category");
}
}
}
[System.Runtime.Serialization.DataMemberAttribute()]
public string CreateTime {
get {
return this.CreateTimeField;
}
set {
if ((object.ReferenceEquals(this.CreateTimeField, value) != true)) {
this.CreateTimeField = value;
this.RaisePropertyChanged("CreateTime");
}
}
}
[System.Runtime.Serialization.DataMemberAttribute()]
public string DataTextField {
get {
return this.DataTextFieldField;
}
set {
if ((object.ReferenceEquals(this.DataTextFieldField, value) != true)) {
this.DataTextFieldField = value;
this.RaisePropertyChanged("DataTextField");
}
}
}
[System.Runtime.Serialization.DataMemberAttribute()]
public string DataValueField {
get {
return this.DataValueFieldField;
}
set {
if ((object.ReferenceEquals(this.DataValueFieldField, value) != true)) {
this.DataValueFieldField = value;
this.RaisePropertyChanged("DataValueField");
}
}
}
[System.Runtime.Serialization.DataMemberAttribute()]
public string DefaultValueCondition {
get {
return this.DefaultValueConditionField;
}
set {
if ((object.ReferenceEquals(this.DefaultValueConditionField, value) != true)) {
this.DefaultValueConditionField = value;
this.RaisePropertyChanged("DefaultValueCondition");
}
}
}
[System.Runtime.Serialization.DataMemberAttribute()]
public string DisplayColumns {
get {
return this.DisplayColumnsField;
}
set {
if ((object.ReferenceEquals(this.DisplayColumnsField, value) != true)) {
this.DisplayColumnsField = value;
this.RaisePropertyChanged("DisplayColumns");
}
}
}
[System.Runtime.Serialization.DataMemberAttribute()]
public string LastUpdateTime {
get {
return this.LastUpdateTimeField;
}
set {
if ((object.ReferenceEquals(this.LastUpdateTimeField, value) != true)) {
this.LastUpdateTimeField = value;
this.RaisePropertyChanged("LastUpdateTime");
}
}
}
[System.Runtime.Serialization.DataMemberAttribute()]
public string OrderFields {
get {
return this.OrderFieldsField;
}
set {
if ((object.ReferenceEquals(this.OrderFieldsField, value) != true)) {
this.OrderFieldsField = value;
this.RaisePropertyChanged("OrderFields");
}
}
}
[System.Runtime.Serialization.DataMemberAttribute()]
public string RowId {
get {
return this.RowIdField;
}
set {
if ((object.ReferenceEquals(this.RowIdField, value) != true)) {
this.RowIdField = value;
this.RaisePropertyChanged("RowId");
}
}
}
[System.Runtime.Serialization.DataMemberAttribute()]
public string SearchEngineId {
get {
return this.SearchEngineIdField;
}
set {
if ((object.ReferenceEquals(this.SearchEngineIdField, value) != true)) {
this.SearchEngineIdField = value;
this.RaisePropertyChanged("SearchEngineId");
}
}
}
[System.Runtime.Serialization.DataMemberAttribute()]
public string SelectDataObjectId {
get {
return this.SelectDataObjectIdField;
}
set {
if ((object.ReferenceEquals(this.SelectDataObjectIdField, value) != true)) {
this.SelectDataObjectIdField = value;
this.RaisePropertyChanged("SelectDataObjectId");
}
}
}
[System.Runtime.Serialization.DataMemberAttribute()]
public string SourceObject {
get {
return this.SourceObjectField;
}
set {
if ((object.ReferenceEquals(this.SourceObjectField, value) != true)) {
this.SourceObjectField = value;
this.RaisePropertyChanged("SourceObject");
}
}
}
[System.Runtime.Serialization.DataMemberAttribute(Name="rowId")]
public string rowId1 {
get {
return this.rowId1Field;
}
set {
if ((object.ReferenceEquals(this.rowId1Field, value) != true)) {
this.rowId1Field = value;
this.RaisePropertyChanged("rowId1");
}
}
}
public event System.ComponentModel.PropertyChangedEventHandler PropertyChanged;
protected void RaisePropertyChanged(string propertyName) {
System.ComponentModel.PropertyChangedEventHandler propertyChanged = this.PropertyChanged;
if ((propertyChanged != null)) {
propertyChanged(this, new System.ComponentModel.PropertyChangedEventArgs(propertyName));
}
}
}
该标识序列化之后的类在是Reference.cs文件中找到的。
此处的详细分析，可以参考：点击打开链接
解决方案：
将Reference.cs文件所有标识序列化的类、枚举，全部删除，改为引用SPI中的实体类、枚举，然后，重新生成WCFClient，部署，问题搞定。
今天的收获：
1、断点没有进入函数（HelpDisplayEditorForm_Load），并不表示问题，一定在函数之外。
2、数据契约中KnownTypeAttribute属性，在同一个类上标识很多次，如下图：
