이 방법의 오류를 보여줍니다 500

나는이 드롭 다운을 가지고 첫 번째 드롭 잘 작동하고 데이터베이스에서 데이터를 표시하지만 아래 두 번째 드롭 여기에 오류 (500)를 보여줍니다 웹 서비스에 대한 내 코드입니다 :이 방법의 오류를 보여줍니다 500

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Web; 
using System.Web.Services; 
using System.Configuration; 
using System.Data.SqlClient; 
using System.Collections.Specialized; 
using AjaxControlToolkit; 
using System.Data; 


[WebService(Namespace = "http://tempuri.org/")] 
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)] 
// To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line. 
[System.Web.Script.Services.ScriptService] 
public class CascadingDropdown : System.Web.Services.WebService 
{ 
private static string strconnection = ConfigurationManager.ConnectionStrings["ConnectionString"].ToString(); 
//private static string strconnection = ConfigurationManager.AppSettings["ConnectionString"].ToString(); 
SqlConnection concategory = new SqlConnection(strconnection); 

public CascadingDropdown() 
{ 

    //Uncomment the following line if using designed components 
    //InitializeComponent(); 
} 

[WebMethod] 
public CascadingDropDownNameValue[] BindCategoryDetails(string knownCategoryValues, string category) 
{ 

    concategory.Open(); 
    SqlCommand cmdcategory = new SqlCommand("select * from Categories", concategory); 
    //create list and add items in it by looping through dataset table 
    List<CascadingDropDownNameValue> categorydetails = new List<CascadingDropDownNameValue>(); 
    SqlDataReader drcategory= null ; 
    drcategory=cmdcategory.ExecuteReader(); 
    while(drcategory.Read()) 
    { 
     string CategoryID = drcategory ["categoryID"].ToString(); 
     string CategoryName = drcategory ["categoryName"].ToString(); 
     categorydetails.Add(new CascadingDropDownNameValue(CategoryName, CategoryID)); 
    } 
    concategory.Close(); 
    return categorydetails.ToArray(); 
} 
/// <summary> 
/// WebMethod to Populate State Dropdown 
/// </summary> 
[WebMethod] 
public CascadingDropDownNameValue[] BindProductDetails(string knownCategoryValues, string category) 
{ 
    int categoryID; 
    //This method will return a StringDictionary containing the name/value pairs of the currently selected values 
    StringDictionary categorydetails = AjaxControlToolkit.CascadingDropDown.ParseKnownCategoryValuesString(knownCategoryValues); 
    categoryID = Convert.ToInt32(categorydetails["Category"]); 
    concategory.Open(); 
    SqlCommand cmdproduct = new SqlCommand("select * from Products where [email protected]", concategory); 
    cmdproduct.Parameters.AddWithValue("@categoryID", categoryID);   
    //create list and add items in it by looping through dataset table 
    List<CascadingDropDownNameValue> productdetails = new List<CascadingDropDownNameValue>();  
    SqlDataReader drproduct= null ; 
    drproduct=cmdproduct.ExecuteReader();  
    while(drproduct.Read())  { 
     string ProductID = drproduct ["categoryID"].ToString(); 
     string ProductName = drproduct ["categoryName"].ToString(); 
     productdetails.Add(new CascadingDropDownNameValue(ProductName, ProductID)); 
    } 
    concategory.Close();  
    return productdetails.ToArray(); 

}

}

및 영문 코드 : U이 필요로하는 다른 THER의 아무것도 말해

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" EnableEventValidation="false"%> 
<%@ Register Namespace="AjaxControlToolkit" Assembly="AjaxControlToolkit" tagPrefix="ajax" %> 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 

<html xmlns="http://www.w3.org/1999/xhtml"> 
<head runat="server"> 
<title></title> 
</head> 
<body> 
<form id="form1" runat="server"> 
<div> 

</div> 

<asp:ScriptManager ID="ScriptManager1" runat="server"> 
</asp:ScriptManager> 
<br /> 
<asp:DropDownList ID="ddlcategory" runat="server"></asp:DropDownList> 
<ajax:CascadingDropDown ID="ccdCategory" runat="server" Category="category" 
    TargetControlID="ddlcategory" PromptText="Select Category" 
    LoadingText="Loading Categories" ServiceMethod="BindCategoryDetails" 
    ServicePath="CascadingDropdown.asmx"> 
</ajax:CascadingDropDown> 
<asp:DropDownList ID="ddlproduct" runat="server"> 
</asp:DropDownList> 
<ajax:CascadingDropDown ID="ccdProduct" runat="server" Category="product" 
TargetControlID="ddlproduct" PromptText="Select Product" 
    LoadingText="Loading Products" ServiceMethod="BindProductDetails" 
    ScriptPath="CascadingDropdown.asmx"> 
    </ajax:CascadingDropDown> 
</form> 
</body> 
</html>

가 있는지 확인합니다. 감사.

출처

2012-07-13 Hamed Abbasi

의해 대체되어야한다. ToString()를 ; 그것은 ProductID가 아니어야합니까? –

ProductID에 CategoryID를 지정하려고하면 오류가 발생했다고 생각합니다. 두번째 드롭 다운리스트 바인딩 코드

string ProductID = drproduct ["categoryID"].ToString(); 
string ProductName = drproduct ["categoryName"].ToString();

에서 상기 코드는 카테고리 ID가 ID '문자열 제품 ID = drproduct [ "카테고리 ID를"] Projduct하도록 할당하는 두번째 드롭이

string ProductID = drproduct ["ProductID"].ToString(); 
string ProductName = drproduct ["ProductName"].ToString();

출처

2012-07-13 15:03:21

코드를 수정했지만 문제가 여전히 있습니다. –

서비스 메서드 확인 BindProductDetails가 데이터를 반환합니다. –

이 방법의 오류를 보여줍니다 500

답변

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