Snake.Net
XML Web Service 數據交換
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客戶端調用服務器端的 Web 服務并傳遞包含數據的 DataSet (ds)：
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Private Sub Synchronize()
??? Dim username As String = "JohnS"
??? Dim blnSuccess As Boolean
??? ' 使用 XML Web Service 進行同步
??? Cursor.Current = Cursors.WaitCursor
??? Dim wsFeedback As New wsFeedback.feedback
??? blnSuccess = wsFeedback.InsertFeedback(ds, username)
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??? Cursor.Current = Cursors.Default
End Sub
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服務器端的 Web 服務接受 DataSet 并將 XML 直接傳遞到 SQL Server 2000 存儲的過程中，該過程使用 SQLXML（英文）和 OPENXML 解析 XML 并將新數據插入適當的表格。
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<WebMethod()> _
Public Function InsertFeedback(ByVal ds As DataSet, ByVal username As
? String) As Boolean
??? Dim con As New SqlConnection(connectionstring)
??? Dim cmd As New SqlCommand("p_Feedback_i", con)
??? cmd.CommandType = CommandType.StoredProcedure
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??? ' 設置參數
??? Dim prmXML As SqlParameter = cmd.Parameters.Add("@XML",
????? SqlDbType.NText)
??? prmXML.Direction = ParameterDirection.Input
??? prmXML.Value = ds.GetXml
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??? Dim prmUsername As SqlParameter = cmd.Parameters.Add("@Username",
????? SqlDbType.NVarChar)
??? prmUsername.Direction = ParameterDirection.Input
??? prmUsername.Value = username
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??? Try
??? con.Open()
??????? cmd.ExecuteNonQuery()
??? Catch ex As Exception
??????? ' 處理、記錄并重擲錯誤
??????? Throw ex
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??? Finally
??????? con.Close()
??? End Try
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??? Return True
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End Function
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The stored procedure inserts the new data:
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CREATE PROCEDURE p_Feedback_i
?? @XML ntext,
?? @Username nvarchar(50)
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AS
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SET NOCOUNT ON
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DECLARE @iDoc? ?integer
DECLARE @Error?? integer
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/* Create XML document. */
EXEC sp_xml_preparedocument @iDoc OUTPUT, @XML
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/* Insert new records */
INSERT INTO??? Feedback
????? (
????? FeedbackID,
????? PlantSection,
????? Part,
????? DefectScope,
????? ScopeID,
???? ?DefectType,
????? RichInk,
????? Username
????? )
SELECT???? ID,
????? PlantSection,
????? Part,
????? DefectScope,
????? ScopeID,
????? DefectType,
????? RichInk,
????? @Username
FROM OPENXML (@iDoc, '/DataSet/Feedback',2) WITH
????? (
????? ID?? uniqueidentifier,
????? PlantSection?? int,
????? Part????? int,
????? DefectScope?? int,
????? ScopeID?? nvarchar(50),
????? DefectType?? int,
????? RichInk????? nvarchar(50)
????? )
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SELECT @Error = @@ERROR
IF (@Error <> 0)
BEGIN
?? GOTO Errorhandler
END
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/* Remove the XML document*/
EXEC sp_xml_removedocument @iDoc
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RETURN
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Errorhandler:
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IF NOT @iDoc IS NULL
?? EXEC sp_xml_removedocument @iDoc
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RAISERROR (@Error,16,1)
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RETURN
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