使用C＃應用程序添加和編輯XML文件

Question

我試圖創建一個Web應用程序，它允許你添加&編輯XML文件在VS快遞網絡2013，但我不能爲我的生活弄清楚我做錯了什麼。任何幫助將大大學徒，謝謝！

這裏是我下面的代碼：你DataSetDS使用ReadXml

using System; 
    using System.Collections.Generic; 
    using System.Linq; 
    using System.Web; 
    using System.Web.UI; 
    using System.Web.UI.WebControls; 
    using System.Data; 
    using System.Xml; 
    using System.Xml.Linq; 
    using System.Windows; 
    using System.Windows.Forms; 
    using System.IO; 
    using System.Text; 

    namespace P.Marina 
    { 
     public partial class SlipBooking : System.Web.UI.Page 
     { 
      DataSet DS = new DataSet(); 
      DataView dv = new DataView(); 

      enum DBNum : int { Customer }; 

      protected void PageLoad(object sender, EventArgs e) 
      { 
       LoadDatabase(); 
      } 

      void LoadDatabase() 
      { 
       DS.ReadXml(Server.MapPath("Customer.xml"), XmlReadMode.InferSchema); 
       DS.Tables[(int)DBNum.Customer].PrimaryKey = new DataColumn[] { 
        DS.Tables[0].Columns["ID"] }; 
       CustomerRecordList(); 
      } 
      public void CustomerRecordList() 
      { 
       DataView cv = DS.Tables[(int)DBNum.Customer].DefaultView; 
       cv.Sort = "Name"; 

       CustomerList.DataTextField = "Name"; 
       CustomerList.DataValueField = "ID"; 
       CustomerList.DataSource = cv; 

       if (!IsPostBack) 
       { 
        CustomerList.DataBind(); 
       } 

      } 

      // customer dropdownlist 

      protected void btnCustomerRecord_Click(object sender, EventArgs e) 
      { 
       DataRow DR; 
       DR = DS.Tables[(int)DBNum.Customer].Rows.Find(CustomerList.SelectedValue); 

       string ID = DR[0].ToString(); 
       string Name = DR[1].ToString(); 
       string Address = DR[2].ToString(); 
       string Email = DR[3].ToString(); 
       Label27.Text = ID; 
       Label3.Text = Name; 
       Label4.Text = Address; 
       Label5.Text = Email; 


       TextBox1.Text = Name; 
       TextBox2.Text = Address; 
       TextBox4.Text = Email; 
      } 

      // Following code is for editing the customer informnation. 

      protected void Button7_Click(object sender, EventArgs e) 
      { 
       DataRow CR; 
       CR = DS.Tables[(int)DBNum.Customer].Rows.Find(CustomerList.SelectedValue); 


       if (TextBox1.Text == Name.Text) 
       { 
       } 

       else 
       { 
        CR[1] = TextBox1.Text; 
       } 
       if (TextBox2.Text == Address.Text) 
       { 
       } 
       else 
       { 
        CR[2] = TextBox2.Text; 
       } 
       if 
        (TextBox4.Text == Email.Text) 
       { 
       } 
       else 
       { 
        CR[3] = TextBox4.Text; 
       } 



       DS.AcceptChanges(); 
       var editCustomerFileLocation = File.Create(Server.MapPath("Customer.xml")); 

       DS.Tables[(int)DBNum.Customer].WriteXml(editCustomerFileLocation); 

       editCustomerFileLocation.Close(); 

       DS.Clear(); 

       LoadDatabase(); 
       CustomerList.DataBind(); 
      } 




      public void Button8_Click(object sender, EventArgs e) 
      { 
       DataRow NewRow = DS.Tables[(int)DBNum.Customer].NewRow(); 

       NewRow[0] = DS.Tables[(int)DBNum.Customer].Rows.Count + 1; 

       int index = DS.Tables[(int)DBNum.Customer].Rows.Count + 1; 

       if (TextBox5.Text == "") 
       { } 
       else 
       { 
        NewRow[1] = TextBox5.Text; 
       } 
       if (TextBox6.Text == "") 
       { } 
       else 
       { 
        NewRow[2] = TextBox6.Text; 
       } 
       if (TextBox7.Text == "") 
       { } 
       else 
       { 
        NewRow[3] = TextBox7.Text; 
       } 


       /*NewRow[4] = "";*/ 

       DS.Tables[(int)DBNum.Customer].Rows.InsertAt(NewRow, index); 

       var fileLocation = File.Create(Server.MapPath("Customer.xml")); 

       DS.Tables[(int)DBNum.Customer].WriteXml(fileLocation); 

       fileLocation.Close(); 

       DS.Clear(); 

       LoadDatabase(); 
       CustomerList.DataBind(); 
      } 
     } 
    } 

} 

Answer 1

你添加數據。但它似乎是空的，因爲DS.Tables[0]會引發索引超出範圍異常。

你需要確保數據正確填寫：

void LoadDatabase() 
{ 
    DS.ReadXml(Server.MapPath("Customer.xml"), XmlReadMode.InferSchema); 

    // check the number of tables here 
    int count = ds.Tables.Count; 
    System.Diagnostics.Debugger.Break(); 

    DS.Tables[(int)DBNum.Customer].PrimaryKey = new DataColumn[] { 
       DS.Tables[0].Columns["ID"] }; 
    CustomerRecordList(); 
}