LINQ和Web服务问题 [英] LINQ and Web Service Issue
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问题描述
你好，
我是Web服务(和LINQ)的新手，并且正在兜圈子，试图弄清楚这个问题.
当我在本地主机上运行该服务时，我的服务运行良好，并且当我使用另一台PC上的本地运行的服务时，也没有问题.但是，当我尝试使用IIS使用服务时，仅使用LINQ的函数(字符串函数被成功使用)消耗了问题.我的错误消息是:
Hello,
I am new to Web Services (and LINQ) and am going in circles trying to figure this issue out.
I have a service that works fine when I run it on local host and also I have no issue when I consume the locally running service from another pc. However, when I try to consume the service using IIS, I am having issues consuming only the function that uses LINQ (string functions are successfully consumed). My error message is :
+ ex {"Unable to cast object of type 'WhereSelectEnumerableIterator`2[VB$AnonymousType_0`2[System.Data.DataRow,System.String],System.String]' to type 'System.Collections.Generic.List`1[ClientServ.Characteristics]'."} System.Exception
在我的服务中访问的.dll代码如下所示:
My .dll code that is accessed in my service looks like this :
Dim query = (From chars In dtChar.AsEnumerable() _
Select New Characteristics With { _
.Description = chars.Field(Of String)("Description"), _
.Port = chars.Field(Of String)("port"), _
.Index = chars.Field(Of String)("index1"), _
.Index2 = chars.Field(Of String)("index2")}).ToList
Getcharacteristics = query
我的服务合同:
My service contract:
<OperationContract()> _
Function S_GetChar(ByVal strServer As String, _
ByVal fromDate As Date, _
ByVal ToDate As Date, _
ByVal arrEntities As String, _
Optional ByVal index As String = "", _
Optional ByVal Frequency As Char = "M", _
Optional ByVal strChars As String = "", _
Optional ByVal NumDigits As Integer = 2, _
Optional ByVal blSuffix As Integer = 1, _
Optional ByVal ErrorMsg As Integer = 0, _
Optional ByVal PortOnly As Integer = 0) As List(Of ClientServ.Characteristics)
服务范围内的功能:
My function within my service:
Public Function S_GetChar(ByVal strServer As String, _
ByVal fromDate As Date, _
ByVal ToDate As Date, _
ByVal arrEntities As String, _
Optional ByVal index As String = "", _
Optional ByVal Frequency As Char = "M", _
Optional ByVal strChars As String = "", _
Optional ByVal NumDigits As Integer = 2, _
Optional ByVal blSuffix As Integer = 1, _
Optional ByVal ErrorMsg As Integer = 0, _
Optional ByVal PortOnly As Integer = 0) As List(Of ClientServ.Characteristics) Implements IPA_Service1.S_GetChar
Dim results As New System.Collections.Generic.List(Of ClientServ.Characteristics)
Dim testChar As New ClientServ.Characteristics
results = testChar.Getcharacteristics(strServer, fromDate, ToDate, arrEntities, index, Frequency, strChars, NumDigits, blSuffix, ErrorMsg, PortOnly)
Return results
End Function
应用配置:
App config:
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<system.web>
<compilation debug="true" />
</system.web>
<!-- When deploying the service library project, the content of the config file must be added to the host's
app.config file. System.Configuration does not support config files for libraries. -->
<system.serviceModel>
<serviceHostingEnvironment aspNetCompatibilityEnabled="true" />
<services>
<service name="WCF_PAService.PA_Service1">
<endpoint address="" binding="wsHttpBinding" contract="WCF_PAService.IPA_Service1">
<identity>
<dns value="localhost" />
</identity>
</endpoint>
<endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />
<host>
<baseAddresses>
<add baseAddress="http://hostname-v:8732/Design_Time_Addresses/WCF_PAService/PA_Service1/" />
</baseAddresses>
</host>
</service>
</services>
<behaviors>
<serviceBehaviors>
<behavior>
<!-- To avoid disclosing metadata information,
set the value below to false and remove the metadata endpoint above before deployment -->
<serviceMetadata httpGetEnabled="True"/>
<!-- To receive exception details in faults for debugging purposes,
set the value below to true. Set to false before deployment
to avoid disclosing exception information -->
<serviceDebug includeExceptionDetailInFaults="True" />
</behavior>
</serviceBehaviors>
</behaviors>
</system.serviceModel>
</configuration>
Web.config:
Web.config:
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<system.web>
<compilation debug="true" />
</system.web>
<!-- When deploying the service library project, the content of the config file must be added to the host's
app.config file. System.Configuration does not support config files for libraries. -->
<system.serviceModel>
<services>
<service name="WCF_PAService.PA_Service1">
<endpoint address="" binding="wsHttpBinding" contract="WCF_PAService.IPA_Service1">
<identity>
<dns value="localhost" />
</identity>
</endpoint>
<endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />
<host>
<baseAddresses>
<add baseAddress="http://hostname-v:8732/Design_Time_Addresses/WCF_PAService/PA_Service1/" />
</baseAddresses>
</host>
</service>
</services>
<behaviors>
<serviceBehaviors>
<behavior>
<!-- To avoid disclosing metadata information,
set the value below to false and remove the metadata endpoint above before deployment -->
<serviceMetadata httpGetEnabled="True"/>
<!-- To receive exception details in faults for debugging purposes,
set the value below to true. Set to false before deployment
to avoid disclosing exception information -->
<serviceDebug includeExceptionDetailInFaults="True" />
</behavior>
</serviceBehaviors>
</behaviors>
</system.serviceModel>
</configuration>
如果有人可以帮忙！我已经花了几个小时在圈子里走！提前非常感谢您！
If someone could please help! I have spent literally hours on this, going in circles! Thank you so much in advance!
推荐答案
AnonymousType_0`2 [System.Data.DataRow，System.String]，System.String]'键入"System.Collections" .Generic.List`1 [ClientServ.Characteristics]'.} System.Exception
AnonymousType_0`2[System.Data.DataRow,System.String],System.String]' to type 'System.Collections.Generic.List`1[ClientServ.Characteristics]'."} System.Exception
在我的服务中访问的.dll代码如下所示:
My .dll code that is accessed in my service looks like this :
Dim query = (From chars In dtChar.AsEnumerable() _
Select New Characteristics With { _
.Description = chars.Field(Of String)("Description"), _
.Port = chars.Field(Of String)("port"), _
.Index = chars.Field(Of String)("index1"), _
.Index2 = chars.Field(Of String)("index2")}).ToList
Getcharacteristics = query
我的服务合同:
My service contract:
<OperationContract()> _
Function S_GetChar(ByVal strServer As String, _
ByVal fromDate As Date, _
ByVal ToDate As Date, _
ByVal arrEntities As String, _
Optional ByVal index As String = "", _
Optional ByVal Frequency As Char = "M", _
Optional ByVal strChars As String = "", _
Optional ByVal NumDigits As Integer = 2, _
Optional ByVal blSuffix As Integer = 1, _
Optional ByVal ErrorMsg As Integer = 0, _
Optional ByVal PortOnly As Integer = 0) As List(Of ClientServ.Characteristics)
服务范围内的功能:
My function within my service:
Public Function S_GetChar(ByVal strServer As String, _
ByVal fromDate As Date, _
ByVal ToDate As Date, _
ByVal arrEntities As String, _
Optional ByVal index As String = "", _
Optional ByVal Frequency As Char = "M", _
Optional ByVal strChars As String = "", _
Optional ByVal NumDigits As Integer = 2, _
Optional ByVal blSuffix As Integer = 1, _
Optional ByVal ErrorMsg As Integer = 0, _
Optional ByVal PortOnly As Integer = 0) As List(Of ClientServ.Characteristics) Implements IPA_Service1.S_GetChar
Dim results As New System.Collections.Generic.List(Of ClientServ.Characteristics)
Dim testChar As New ClientServ.Characteristics
results = testChar.Getcharacteristics(strServer, fromDate, ToDate, arrEntities, index, Frequency, strChars, NumDigits, blSuffix, ErrorMsg, PortOnly)
Return results
End Function
应用配置:
App config:
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<system.web>
<compilation debug="true" />
</system.web>
<!-- When deploying the service library project, the content of the config file must be added to the host's
app.config file. System.Configuration does not support config files for libraries. -->
<system.serviceModel>
<serviceHostingEnvironment aspNetCompatibilityEnabled="true" />
<services>
<service name="WCF_PAService.PA_Service1">
<endpoint address="" binding="wsHttpBinding" contract="WCF_PAService.IPA_Service1">
<identity>
<dns value="localhost" />
</identity>
</endpoint>
<endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />
<host>
<baseAddresses>
<add baseAddress="http://hostname-v:8732/Design_Time_Addresses/WCF_PAService/PA_Service1/" />
</baseAddresses>
</host>
</service>
</services>
<behaviors>
<serviceBehaviors>
<behavior>
<!-- To avoid disclosing metadata information,
set the value below to false and remove the metadata endpoint above before deployment -->
<serviceMetadata httpGetEnabled="True"/>
<!-- To receive exception details in faults for debugging purposes,
set the value below to true. Set to false before deployment
to avoid disclosing exception information -->
<serviceDebug includeExceptionDetailInFaults="True" />
</behavior>
</serviceBehaviors>
</behaviors>
</system.serviceModel>
</configuration>
Web.config:
Web.config:
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<system.web>
<compilation debug="true" />
</system.web>
<!-- When deploying the service library project, the content of the config file must be added to the host's
app.config file. System.Configuration does not support config files for libraries. -->
<system.serviceModel>
<services>
<service name="WCF_PAService.PA_Service1">
<endpoint address="" binding="wsHttpBinding" contract="WCF_PAService.IPA_Service1">
<identity>
<dns value="localhost" />
</identity>
</endpoint>
<endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />
<host>
<baseAddresses>
<add baseAddress="http://hostname-v:8732/Design_Time_Addresses/WCF_PAService/PA_Service1/" />
</baseAddresses>
</host>
</service>
</services>
<behaviors>
<serviceBehaviors>
<behavior>
<!-- To avoid disclosing metadata information,
set the value below to false and remove the metadata endpoint above before deployment -->
<serviceMetadata httpGetEnabled="True"/>
<!-- To receive exception details in faults for debugging purposes,
set the value below to true. Set to false before deployment
to avoid disclosing exception information -->
<serviceDebug includeExceptionDetailInFaults="True" />
</behavior>
</serviceBehaviors>
</behaviors>
</system.serviceModel>
</configuration>
如果有人可以帮忙！我已经花了几个小时在圈子里走！提前非常感谢您！
If someone could please help! I have spent literally hours on this, going in circles! Thank you so much in advance!
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