帶有名稱和值的XML下拉列表

Question

我有三個依賴級聯下拉列表。它們是從一個XML文件填充的，該文件對列表項目工作正常，但我需要包含在列表項中的值，以便將它們傳遞給數據庫。

這裏是我的改制XML文檔中的一個節點：

<Organizations> 
    <Organization> 
    <name value="A0EAD6A8813E474B9F9A3E0C64D72F61">Hospital</name> 
    <JobTitle1> 
     <name value="-2">Physician</name> 
     <JobTitle2> 
     <name value="E5B838C3AA304813B3EA4E28EE33702F">Anesthesiologist</name> 
     </JobTitle2> 
     <JobTitle2> 
     <name value="36C9F22DC54347CEA39C142FE91E8B36">A and E</name> 
     </JobTitle2> 
     <JobTitle2> 
     <name value="35E798C18DC04ECFB022DCF0E6DBEB51">Cardiologist</name> 
     </JobTitle2> 
     <JobTitle2> 
     <name value="343B2555E45142E096546A3781680C02">Dental Surgeon</name> 
     </JobTitle2> 
     <JobTitle2> 
     <name value="A5C669F6DB4D41DA8409960D6952023C">Diabetologist/Endocrinologist</name> 
     </JobTitle2> 
     <JobTitle2> 
     <name value="2B01B4C29253459797CB596FE81C3AF4">ENT</name> 
     </JobTitle2> 
     <JobTitle2> 
     <name value="6C761F3F81CB421BBD0746914031EF19">General Medicine</name> 
     </JobTitle2> 
     <JobTitle2> 
     <name value="9DB49A58B8484E73AA24227DCDAD4C96">Intensivist</name> 
     </JobTitle2> 
     <JobTitle2> 
     <name value="F80D023B174A421A82A140691BCD9E22">Neurologist</name> 
     </JobTitle2> 
     <JobTitle2> 
     <name value="3F95529E15764EB1A55255DCEDDB6C4A">Pediatrician</name> 
     </JobTitle2> 
     <JobTitle2> 
     <name value="9FC573D63A884C04A8675E86B43EABB9">Psychiatrist</name> 
     </JobTitle2> 
     <JobTitle2> 
     <name value="7230D95FE4844A7785D25A73D5240BB9">Respiratory</name> 
     </JobTitle2> 
     <JobTitle2> 
     <name value="E784A9F594BF468D85C51BBD5A9B0F5D">Trainee</name> 
     </JobTitle2> 
     <JobTitle2> 
     <name value="431614E6148A4F639F912ED08803BD79">Other Physician</name> 
     </JobTitle2> 
    </JobTitle1> 
    <JobTitle1> 
     <name value="111AEF6C39984713AA10E6F1D051F97E">Nurse</name> 
    </JobTitle1> 
    <JobTitle1> 
     <name value="90CF5DB3D06A4B759F21A3F20B5F5DD4">Physiologist</name> 
    </JobTitle1> 
    <JobTitle1> 
     <name value="55F8C6537718420DB6E4E3A7C087D540">Physiotherapist</name> 
    </JobTitle1> 
    <JobTitle1> 
     <name value="884EB090E9B7469DA3CA8BA2D6FC4F4E">Biomedical Engineer/Technician</name> 
    </JobTitle1> 
    <JobTitle1> 
     <name value="C2383AA850534CD9A4E03019386AA56C">Administrator</name> 
    </JobTitle1> 
    <JobTitle1> 
     <name value="C8997E78569A4410956E5E7C6C1D57F2">Manager</name> 
    </JobTitle1> 
    <JobTitle1> 
     <name value="5196E883DF614A319A3CDF4573C3E858">Supplies/Procurement</name> 
    </JobTitle1> 
    </Organization> 

其他節點都差不多，沒必要浪費的空間，張貼在這裏。 DDL中的所有文本工作正常。

這裏是aspx.cs代碼背後得到的值中的DDL：

using System; 
    using System.Collections.Generic; 
    using System.Linq; 
    using System.Web; 
    using System.Web.UI; 
    using System.Web.UI.WebControls; 

namespace CSASPNETCascadingDropDownList 
{ 
    public partial class CascadingDropDownListWithPostBack : System.Web.UI.Page 
    { 
     /// <summary> 
     /// Page Load event 
     /// </summary> 
     /// <param name="sender"></param> 
     /// <param name="e"></param> 
     protected void Page_Load(object sender, EventArgs e) 
     { 
      if (!IsPostBack) 
      { 
       // Bind Org dropdownlist 
       BindddlOrg(); 
       ddlJobTitle1.Enabled = false; 
       ddlJobTitle2.Enabled = false; 

       // Insert one item to dropdownlist top 
       ddlJobTitle1.Items.Insert(0, new ListItem("Select JobTitle1", "-1")); 
       ddlJobTitle2.Items.Insert(0, new ListItem("Select JobTitle2", "-1")); 

       // Initialize JobTitle2 dropdownlist selected index 
       hdfDdlJobTitle2SelectedIndex.Value = "0"; 
      } 
     } 

     /// <summary> 
     /// Bind Org dropdownlist 
     /// </summary> 
     /// 
      public class XmlValue { 
      public int value {get; set;} //getter and setter are important 
      public string name {get; set;} 
     } 
     public void BindddlOrg() 
     { 
      List<XmlValue> list = RetrieveDataFromXml.GetAllOrg(); 
      ddlOrg.DataSource = list; 
      ddlOrg.DataBind(); 
      ddlOrg.Items.Insert(0, new ListItem("Select Organization", "-1")); 
     } 

     /// <summary> 
     /// Show selected value 
     /// </summary> 
     /// <param name="sender"></param> 
     /// <param name="e"></param> 
     protected void Button1_Click(object sender, EventArgs e) 
     { 
      // Get the selected index of JobTitle2 dropdownlist 
      int iJobTitle2Selected = Convert.ToInt16(hdfDdlJobTitle2SelectedIndex.Value); 

      // The result will be showing 
      string strResult = string.Empty; 
      if (ddlOrg.SelectedIndex == 0) 
      { 
       strResult = "Please select a Org."; 
      } 
      else if (ddlJobTitle1.SelectedIndex == 0 && strResult == string.Empty) 
      { 
       strResult = "Please select a JobTitle1"; 
      } 
      else if (hdfDdlJobTitle2SelectedIndex.Value == "0" && strResult == string.Empty) 
      { 
       strResult = "Please select a JobTitle2."; 
      } 
      else 
      { 
       strResult = "You selected Org: " + ddlOrg.SelectedValue 
        + " ; JobTitle1: " + ddlJobTitle1.SelectedValue 
        + " ; JobTitle2: " + ddlJobTitle2.Items[iJobTitle2Selected].Value; 
      } 

      LabelResult.Text = strResult; 
     } 


     /// <summary> 
     /// Org dropdownlist SelectedIndexChanged event 
     /// </summary> 
     /// <param name="sender"></param> 
     /// <param name="e"></param> 
     protected void ddlOrg_SelectedIndexChanged(object sender, EventArgs e) 
     { 
      // Remove JobTitle1 dropdownlist items 
      ddlJobTitle1.Items.Clear(); 
      string strOrg = string.Empty; 
      strOrg = ddlOrg.SelectedValue; 
      List<string> list = null; 

      // Bind JobTitle1 dropdownlist based on Org value 
      if (ddlOrg.SelectedIndex != 0) 
      { 
       list = RetrieveDataFromXml.GetJobTitle1ByOrg(strOrg); 
       if (list != null && list.Count != 0) 
       { 
        ddlJobTitle1.Enabled = true; 
       } 

       ddlJobTitle1.DataSource = list; 
       ddlJobTitle1.DataBind(); 
      } 
      else 
      { 
       ddlJobTitle1.Enabled = false; 
      } 

      ddlJobTitle1.Items.Insert(0, new ListItem("Select JobTitle12", "-1")); 

      // Clear JobTitle2 dropdownlist 
      ddlJobTitle2.Enabled = false; 
      ddlJobTitle2.Items.Clear(); 
      ddlJobTitle2.Items.Insert(0, new ListItem("Select JobTitle22", "-1")); 

      // Initialize JobTitle2 dropdownlist selected index 
      hdfDdlJobTitle2SelectedIndex.Value = "0"; 
     } 


     /// <summary> 
     /// JobTitle1 dropdownlist SelectedIndexChanged event 
     /// </summary> 
     /// <param name="sender"></param> 
     /// <param name="e"></param> 
     protected void ddlJobTitle1_SelectedIndexChanged(object sender, EventArgs e) 
     { 
      // Bind JobTitle2 dropdownlist based on JobTitle1 value 
      string strJobTitle1 = string.Empty; 
      strJobTitle1 = ddlJobTitle1.SelectedValue; 
      List<string> list = null; 
      list = RetrieveDataFromXml.GetJobTitle2ByJobTitle1(strJobTitle1); 
      ddlJobTitle2.Items.Clear(); 
      ddlJobTitle2.DataSource = list; 
      ddlJobTitle2.DataBind(); 
      ddlJobTitle2.Items.Insert(0, new ListItem("Select JobTitle2", "-1")); 

      // Initialize JobTitle2 dropdownlist selected index 
      hdfDdlJobTitle2SelectedIndex.Value = "0"; 

      // Enable JobTitle2 dropdownlist when it has items 
      if (list.Count > 0) 
      { 
       ddlJobTitle2.Enabled = true; 
      } 
      else 
      { 
       ddlJobTitle2.Enabled = false; 
      } 
     } 
    } 
    } 

這裏是CS文件代碼從XML獲取值：

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Web; 
using System.Xml; 

namespace CSASPNETCascadingDropDownList 
{ 
    /// <summary> 
    /// Summary description for CSRetrieveDataFromXml 
    /// </summary> 
    public class RetrieveDataFromXml 
    { 
     /// <summary> 
     /// Constructor 
     /// </summary> 
     public RetrieveDataFromXml() 
     { 
      // 
      // TODO: Add constructor logic here 
      // 
     } 


     /// <summary> 
     /// Get the data source path, in this case, it is the XML file in the 
     /// App_Data folder 
     /// </summary> 
     private static string strXmlPath = HttpContext.Current.Server.MapPath(
      "App_Data") + "\\CustomDataSourceDeep.xml"; 

     /// <summary> 
     /// Get all orgs 
     /// </summary> 
     /// <returns>The List contains organization</returns> 


/* this block works */ 
/*  public static List<string> GetAllOrg() 
     { 
      XmlDocument document = new XmlDocument(); 
      document.Load(strXmlPath); 
      XmlNodeList nodeList = document.SelectNodes("Organizations/Organization"); 
      List<string> list = new List<string>(); 
      foreach (XmlNode node in nodeList) 
      { 
       list.Add(node.Attributes["name"].InnerText); 
      } 
      return list; 
     }*/ 
/* end of working block */ 
/* 
     public static List<string> GetAllOrg() 
     { 
      XmlDocument document = new XmlDocument(); 
      document.Load(strXmlPath); 
      XmlNodeList nodeList = document.SelectNodes("Organizations/Organization"); 
      List<string> list = new List<string>(); 
      foreach (XmlNode node in nodeList) 
      { 
       list.Add(node.SelectSingleNode("name").InnerText, node.Attributes["value"].Value); 
      } 
      return list; 
     } 
*/ 
    public class XmlValue { 
    public string value {get; set;} //getter and setter are important 
    public string name {get; set;} 
} 
      public static List<XmlValue> GetAllOrg() 
    { 
     XmlDocument document = new XmlDocument(); 
     document.Load(strXmlPath); 
     XmlNodeList nodeList = document.SelectNodes("Organizations/Organization"); 
     List<XmlValue > list = new List<XmlValue >(); 
     foreach (XmlNode node in nodeList) 
     { 
      list.Add(new XmlValue(){ 
      value = node.Attributes["name"].Value, 
      name = node.InnerText 
       }); 
     } 
    return list; 
}  

     /// <summary> 
     /// Get JobTitle1 based on Org 
     /// </summary> 
     /// <param name="strOrg">The Org name</param> 
     /// <returns>The list contains JobTitle1</returns> 
     public static List<string> GetJobTitle1ByOrg(string strOrg) 
     { 
      XmlDocument document = new XmlDocument(); 
      document.Load(strXmlPath); 
      XmlNodeList nodeList = document.SelectNodes(
       "Organizations/Organization[@name='" + strOrg + "']/JobTitle1"); 
      List<string> list = new List<string>(); 
      foreach (XmlNode node in nodeList) 
      { 
       list.Add(node.Attributes["name"].Value); 
      } 

      return list; 
     } 


     /// <summary> 
     /// Get JobTitle2 based on JobTitle1 
     /// </summary> 
     /// <param name="strJobTitle1">The JobTitle1 name</param> 
     /// <returns>The list contains JobTitle2</returns> 
     public static List<string> GetJobTitle2ByJobTitle1(string strJobTitle1) 
     { 
      XmlDocument document = new XmlDocument(); 
      document.Load(strXmlPath); 
      XmlNodeList nodeList = document.SelectNodes(
       "Organizations/Organization/JobTitle1[@name='" + strJobTitle1 + "']/JobTitle2"); 
      List<string> list = new List<string>(); 
      foreach (XmlNode node in nodeList) 
      { 
       list.Add(node.Attributes["name"].Value); 
      } 
      return list; 
     } 
    } 
} 

這裏的源即第一個DDL生成：

<option value="-1">Select Org</option> 
<option selected="selected" value="Hospital">Hospital</option> 
<option value="Sleep Lab">Sleep Lab</option> 
<option value="Ventilation Home Service">Ventilation Home Service</option> 
<option value="Community Health Centre">Community Health Centre</option> 
<option value="Home Care Provider">Home Care Provider</option> 
<option value="Med">Med</option> 
<option value="Other">Other</option> 

我需要的是這樣的：

<option value="-1">Select Org</option> 
<option selected="selected" value="A0EAD6A8813E474B9F9A3E0C64D72F61">Hospital</option> 
<option value="DD8BE886FA18401E9CF30AC64B49ACD8">Sleep Lab</option> 
<option value="F8182C928BE14239A576895D39591D38e">Ventilation Home Service</option> 
<option value="E3865431ECF9499692E79DBF2FBAA3B2">Community Health Centre</option> 
<option value="711AA0D43D6346FC9AD38659D9CB8840">Home Care Provider</option> 
<option value="D54FAE898ECF4AB4A92B99C5AA536910">ResMed</option> 
<option value="4E44CDB4F7E5426E99368194BBB73282">Other</option> 

如何讓DDL繼續正確填充，但仍然給我需要傳遞給數據庫的值？

編輯：

我現在收到此錯誤：

錯誤1無法隱式轉換類型 'System.Collections.Generic.List' 到 'System.Collections.Generic.List'

Answer 1

你可以有一個對象（不知道地圖可以作爲的ItemSource）

private class XmlValue { 
    public int value {get; set:} //getter and setter are important 
    public string name {get; set:} 
} 

爲了解析您的XML：

public static List<XmlValue> GetAllOrg() 
    { 
     XmlDocument document = new XmlDocument(); 
     document.Load(strXmlPath); 
     XmlNodeList nodeList = document.SelectNodes("Organizations/Organization"); 
     List<XmlValue > list = new List<XmlValue >(); 
     foreach (XmlNode node in nodeList) 
     { 
      list.Add(new XmnValue(){ 
      value = node.Attributes["name"].Value, 
      name = node.Attributes["name"].Name 
       }); 
     } 
    return list; 
}  

你DDL：

public void BindddlOrg() 
    { 
     List<XmlValue > list = RetrieveDataFromXml.GetAllOrg(); 

     ddlOrg.ItemsSource = list; 

     ddlOrg.Items.Insert(0, new XmlValue(){nqme = "Select Org", value=-1}); 
    } 

最後，結合你的兩個人DDL，使用ItemSelected。

希望它能幫助，