Question

大家好，感谢您的帮助，我需要将我的一个t-sql表列中的每一行写成一个xml文件作为子项。我当前的代码OVER在循环时写入最后一个条目。结果应该看起来像

(desired result)
<array> 
<element>data1</element>
<element>data2</element>
<element>data3</element>
<element>data4</element>
<element>data5</element>
</array>

不（目前）

<array>
<element>data5</element> (the last entry in table column)
</array>

我错过了什么？再次感谢您的时间，非常感谢。

public void Download_Click(object sender, EventArgs e)
{

       string AddressVal;
       string invoiceVal;

       SqlConnection conn = null;
       SqlConnection connTwo = null;
       try
       {



           //**************************************
           string connStr2 = ConfigurationManager.ConnectionStrings["MYConString"].ConnectionString;
           string cmdStr2 = "select * from t_BannerUser";

           connTwo = new SqlConnection(connStr2);
           SqlCommand oleComm2 = new SqlCommand(cmdStr2, connTwo);
           connTwo.Open();
           SqlDataReader oleReader2 = oleComm2.ExecuteReader();
           //************************************** DATATABLE TEST *************
           //SqlDataAdapter da = new SqlDataAdapter(cmdStr2, connStr2);
           //DataTable dt = new DataTable();
           //da.Fill(dt);

           //for (int i = 0; i < dt.Rows.Count; i++)
           //{
           //****************************
           while (oleReader2.Read())
           {

             //  AddressVal = oleReader["c_user"].ToString();
               invoiceVal = oleReader2["c_user_id"].ToString();

        //create XMLTextWriter object and set its save location
        //…the second value is for an Encoding declaration I found to be unnecessary, hence, null
        XmlTextWriter plist = new XmlTextWriter("C:/Temp/plistName.plist", null);
        //assign basic formatting to the XMLTextWriter so that the XML is easily legible
        plist.Formatting = Formatting.Indented;
        //default indentation is 2 spaces; 4 spaces is essentially one “tab”
        plist.Indentation = 4;



        //create the initial xml element to start the document
        plist.WriteProcessingInstruction("xml", "version=\"1.0\" encoding=\"UTF-8\"");
//create a custom DTD
plist.WriteDocType("plist", "-//Apple//DTD PLIST 1.0//EN", "http://www.apple.com/DTDs/PropertyList-1.0.dtd", null);

        //create root element
plist.WriteStartElement("plist");
//assign version attribute
plist.WriteAttributeString("version", "1.0");
//creating a dict element before anything else is required
plist.WriteStartElement("dict");
//create the array key (shows up as the array name when viewing the .plist)
plist.WriteElementString("key", "ArrayName");
//you have to then create the array!
plist.WriteStartElement("array");



//create a dict element to arrange succeeding object attributes
plist.WriteStartElement("dict");
//create key element (shows as item name when viewing the plist)
plist.WriteElementString("key", "KeyName");
//create string element (shows as item value when viewing the plist)
//plist.WriteElementString("string", dt.Rows[i]["c_user_id"].ToString());
plist.WriteElementString("string", invoiceVal.ToString());
//create the array key (shows up as the array name when viewing the plist)
plist.WriteElementString("key", "ArrayName");
//you have to then create the array!
plist.WriteStartElement("array");



        //create a dict element to arrange succeeding object attributes
plist.WriteStartElement("dict");
//create key element (shows as item name when viewing the plist)
plist.WriteElementString("key", "KeyName");
//create string element (shows as item value when viewing the plist)
//plist.WriteElementString("string", DataTable.Rows[int]["ColumnName"].ToString());
plist.WriteElementString("string", invoiceVal.ToString());


plist.Flush();
plist.Close();

              // }
           }

       }

           catch (Exception ex)
       {
           Debug.WriteLine(ex.Message);
       }
    }

Answer 1

您的代码是在while循环的每次迭代开始时创建文件（以及在while循环结束时关闭它）。将该代码移到while循环之外，您将获得更好的结果。

如何添加行中的每个元素而不覆盖最后一个元素

1 个答案: