Question

我有以下格式的XML。将数据填充到数据集的最佳方法是什么？

<VariableTable>
    <InternalName Old="sujith" New="sujitha" /> 
    <InternalName Old="renjith" New="renjitha" /> 
</VariableTable>

Answer 1

Dataset.ReadXML() 方法，您可以使用它，还可以检查此链接Reading xml in Dataset

有很多选择。

提供您的xml文件路径，然后将其加载到数据集
使用XmlTextReader，将其传递给Dataset readxml方法

string xmlFilename = "XmlFilePath.xml";
         DataSet yourDataset = new DataSet();
         yourDataset.ReadXml(xmlFilename);
         // do with your filled Dataset

Answer 2

如果您可以稍微改变XML，那么DataSet提供了内置功能，可以将数据加载到xml或从中导出数据。

然后你可以使用方法中WriteXML（）的ReadXml（）

如果需要加载自定义xml文件格式，则需要编写代码来解析它并填充数据集。为此你可以使用Linq或XPath。

希望有所帮助。

<强>已更新

    var dataSet = new DataSet("TestDataSet");
    var dataTable = new DataTable("TestTable");

    dataTable.Columns.Add("ID", typeof(Int32));
    dataTable.Columns.Add("Value", typeof(string));

    dataTable.Rows.Add(1, "Value1");
    dataSet.Tables.Add(dataTable);

    dataSet.WriteXml(@"L:\ds.xml", XmlWriteMode.WriteSchema);

上面的代码是我用WriteToXml方法的代码。不，这是输出XML格式。

<?xml version="1.0" standalone="yes"?>
<TestDataSet>
  <xs:schema id="TestDataSet" xmlns="" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
    <xs:element name="TestDataSet" msdata:IsDataSet="true" msdata:UseCurrentLocale="true">
      <xs:complexType>
        <xs:choice minOccurs="0" maxOccurs="unbounded">
          <xs:element name="TestTable">
            <xs:complexType>
              <xs:sequence>
                <xs:element name="ID" type="xs:int" minOccurs="0" />
                <xs:element name="Value" type="xs:string" minOccurs="0" />
              </xs:sequence>
            </xs:complexType>
          </xs:element>
        </xs:choice>
      </xs:complexType>
    </xs:element>
  </xs:schema>
  <TestTable>
    <ID>1</ID>
    <Value>Value1</Value>
  </TestTable>
</TestDataSet>

这就是数据存储在XML中的方式......

如果你需要一些简单的东西，这可能会有点开销，但这是开箱即用的功能。

这会让你知道怎么做吗？

Answer 3

Public Function FillDataSetFromXML(ByVal Procedure As String, ByVal param As List(Of SqlParameter)) As DataSet
    Dim dbcon As New dbConnection()
    Dim cmd As New SqlCommand()
    Dim ds As New DataSet()
    Dim XR As XmlReader
    XR = Nothing
    Try
        cmd.CommandType = CommandType.StoredProcedure
        cmd.CommandText = Procedure
        dbcon.OpenConnection()
        cmd.Connection = dbcon.GetDbConnection()
        If param.Count > 0 Then
            For Each p As SqlParameter In param
                cmd.Parameters.AddWithValue(p.ParameterName, p.Value)
            Next
        End If
        XR = cmd.ExecuteXmlReader()
        ds.ReadXml(XR)
        Return ds
    Catch ex As Exception
        Return ds
    Finally
        dbcon.CloseConnection()
    End Try

End Function

Public Function ExecuteScalar(ByVal Qry As String)
    Dim dbcon As New dbConnection
    Dim cmd As New SqlCommand
    Dim res As String
    Try
        cmd.CommandType = CommandType.Text
        cmd.CommandText = Qry
        dbcon.OpenConnection()
        cmd.Connection = dbcon.GetDbConnection()
        res = cmd.ExecuteScalar().ToString()
        Return res

    Catch ex As Exception
        Return res
    Finally
        dbcon.CloseConnection()
    End Try       
End Function

Public Function ExecuteProdedures(ByVal param As List(Of SqlParameter), ByVal Procedure As String) As DataSet

    Dim dbcon As New dbConnection
    Dim ds As New DataSet()

    Try
        Dim cmd As New SqlCommand()
        cmd.CommandType = CommandType.StoredProcedure
        cmd.CommandText = Procedure
        dbcon.OpenConnection()
        cmd.Connection = dbcon.GetDbConnection()
        If param.Count > 0 Then
            For Each p As SqlParameter In param
                'cmd.Parameters.AddWithValue(p.ParameterName, p.Value)
                cmd.Parameters.Add(p)
            Next
        End If
        Dim XR As XmlReader
        XR = cmd.ExecuteXmlReader()
        ds.ReadXml(XR)
        Return ds
    Catch ex As Exception
    Finally
        dbcon.CloseConnection()
    End Try
End Function

将XML数据填充到DataSet

3 个答案: