[MOSS2010]利用BCS进行数据集成(三)

上回说到在给BDC添加Updater方法的时候又遇到了不顺。这回就简要的说说如何做出一个Updater来。

首先是解决上次图中的那个“Unable to find the default edit form for list ...”的问题

既然他说找不到咱就创建一个

 

之后笔者又遭遇了各种各样的困难,主要集中在Identifier的ReadOnly方面。先贴出最终成功的bdcm文件

 

<?xml version="1.0" encoding="utf-8"?>
<Model xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://schemas.microsoft.com/windows/2007/BusinessDataCatalog" Name="BdcModel">
  <LobSystems>
    <LobSystem Name="BdcModel" Type="DotNetAssembly">
      <LobSystemInstances>
        <LobSystemInstance Name="BdcModel" />
      </LobSystemInstances>
      <Entities>
        <Entity Name="Product" Namespace="BdcModel" EstimatedInstanceCount="1000" Version="1.0.1.0">
          <Properties>
            <Property Name="Class" Type="System.String">BdcModel.ProductService, BdcModel</Property>
          </Properties>
          <Identifiers>
            <Identifier Name="ProductID" TypeName="System.Int32"/>
          </Identifiers>
          <Methods>
            <!-- start finder method -->
            <Method Name="ReadList">
              <Parameters>
                <Parameter Direction="Return" Name="returnParameter">
                  <TypeDescriptor TypeName="System.Collections.Generic.IEnumerable`1[[BdcModel.Product, BdcModel]]" IsCollection="true" Name="ProductList">
                    <TypeDescriptors>
                      <TypeDescriptor TypeName="BdcModel.Product, BdcModel" Name="Product">
                        <TypeDescriptors>
                          <TypeDescriptor Name="ProductID" IdentifierName="ProductID" TypeName="System.Int32"/>
                          <TypeDescriptor TypeName="System.String" Name="ProductName" />
                        </TypeDescriptors>
                      </TypeDescriptor>
                    </TypeDescriptors>
                  </TypeDescriptor>
                </Parameter>
              </Parameters>
              <MethodInstances>
                <MethodInstance Type="Finder" ReturnParameterName="returnParameter" Default="true" Name="ReadList" DefaultDisplayName="Product List" />
              </MethodInstances>
            </Method>
            <!-- end finder method -->
            <!-- start specific finder method -->
            <Method Name="ReadItem">
              <Parameters>
                <Parameter Direction="In" Name="id">
                  <TypeDescriptor TypeName="System.Int32" IdentifierName="ProductID" Name="ProductID" />
                </Parameter>
                <Parameter Direction="Return" Name="returnParameter">
                  <TypeDescriptor TypeName="BdcModel.Product, BdcModel" Name="Product">
                    <TypeDescriptors>
                      <TypeDescriptor Name="ProductID" IdentifierName="ProductID" TypeName="System.Int32" ReadOnly="true"/>
                      <TypeDescriptor TypeName="System.String" Name="ProductName" />
                    </TypeDescriptors>
                  </TypeDescriptor>
                </Parameter>
              </Parameters>
              <MethodInstances>
                <MethodInstance Type="SpecificFinder" ReturnParameterName="returnParameter" Default="true" Name="ReadItem" DefaultDisplayName="Read Product" />
              </MethodInstances>
            </Method>
            <Method Name="Update">
              <Parameters>
                <Parameter Name="product" Direction="InOut">
                  <TypeDescriptor Name="Product" TypeName="BdcModel.Product, BdcModel">
                    <TypeDescriptors>
                      <TypeDescriptor Name="ProductID" IdentifierName="ProductID" TypeName="System.Int32" PreUpdaterField="true" ReadOnly="true"/>
                      <TypeDescriptor Name="ProductName" TypeName="System.String" UpdaterField="true" /></TypeDescriptors></TypeDescriptor></Parameter>
              </Parameters>
              <MethodInstances>
                <MethodInstance Name="Update" Type="Updater" Default="true"/>
              </MethodInstances></Method>
            <!-- end specific finder method -->
          </Methods>
        </Entity>
      </Entities>
    </LobSystem>
  </LobSystems>
</Model>

 

需要注意的几点:

1 Updater Method中Parameter的Direction不可为In(本例中位InOut)

2 Updater Method中Parameter的Identifier列需要标记为PreUpdaterField

3 Updater Method中Parameter的Identifier列需要标记为ReadOnly

4 SpecificFinder Method中的Parameter的Identifier列也需要标记为ReadOnly(不知为何)

 

以上,Updater就算实现完了。再有creator等就需要和其他表的级联操作了。留待以后研究。

posted @ 2010-06-08 13:41  jiaxingseng  阅读(344)  评论(0编辑  收藏  举报