MS CRM 2011 C#中獲取Web Resource

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原創地址：http://www.cnblogs.com/jfzhu/archive/2013/02/15/2913077.html

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我在以前的文章中講過如何用JScript讀取web resource資源，我在本文中將要講解如何在C#中獲取web resource資源。

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有時候可能有這樣的需求，你需要在一個插件中讀取某個xml web resource的內容，并將該xml文件作為附件創建一封E-mail。或者該xml文檔是插件的一個配置文件。這時，你就需要在C#中獲取web resource資源了。CRM中web resource不過是一個特殊的entity，在數據庫中你也可以看到web resource table。web resource的內容（content）以Base64編碼保存在數據庫中（參見Base 64 Encoding 編碼）。你只需要知道web resource的name，然后就可以用RetrieveMultiple方法獲取該web resource。下面的代碼演示了，如何獲取一個名為aw_testxml.xml的web resource，并將其內容作為附件發送給一封E-mail。

// Create an e-mail message.    
// Create the 'From:' activity party for the email 
ActivityParty fromParty = new ActivityParty 
{ PartyId = new EntityReference(SystemUser.EntityLogicalName, new Guid("F6F5BB29-D519-E211-B109-B499BAFDBEDA")) 
};// Create the 'To:' activity party for the email 
ActivityParty toParty = new ActivityParty 
{ PartyId = new EntityReference(SystemUser.EntityLogicalName, new Guid("F6F5BB29-D519-E211-B109-B499BAFDBEDA")) 
};Email email = new Email 
{ To = new ActivityParty[] { toParty }, From = new ActivityParty[] { fromParty }, Subject = "SDK Sample e-mail", Description = "SDK Sample for SendEmail Message.", DirectionCode = true 
}; 
Guid _emailId = service.Create(email);QueryExpression mySavedQuery = new QueryExpression 
{ ColumnSet = new ColumnSet(true), EntityName = WebResource.EntityLogicalName, Criteria = new FilterExpression() { Conditions = {                        new ConditionExpression { AttributeName = "name", Operator = ConditionOperator.Equal, Values = {"aw_testxml.xml"} } } } 
};EntityCollection ec = service.RetrieveMultiple(mySavedQuery); 
if (ec != null && ec.Entities != null && ec.Entities.Count > 0) 
{ WebResource webresource = ec.Entities[0].ToEntity<WebResource>(); ActivityMimeAttachment _sampleAttachment = new ActivityMimeAttachment { ObjectId = new EntityReference(Email.EntityLogicalName, _emailId), ObjectTypeCode = Email.EntityLogicalName, Subject = "Sample Attachment", Body = webresource.Content, FileName = "ExampleAttachment.xml" };service.Create(_sampleAttachment); 
}

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