我如何...将Json Data填入下拉列表 [英] How do I...fill Json Data into dropdown list

问题描述

我有以下格式的Json数据

 [{CountryId：India，CountryName：India}，{CountryId：Pakisthan ，CountryName：Pakisthan}，{CountryId：USA，CountryName：USA}] 

如何将此数据绑定到下拉列表

解决方案

步骤1 ：声明自定义类

  public   class 国家
 {
  public   string  CountryId { get < /跨度>;  set ; } 
  public   string  CountryName { get ;  set ; } 
} 

第2步：反序列化Json数据并将其绑定到Dropdown

  string  jsonData =  < /跨度>;  //  将JSON数据分配给变量 
 
  //  创建JavascriptSerializer对象 
 JavaScriptSerializer jsSerializer = 新 JavaScriptSerializer（ ）; 
列表< country> countryList = jsSerializer.Deserialize< list>< country>>（jsonData）; 
 
  //  将数据绑定到下拉列表 
 DropDownList1.DataSource = countryList; 
 DropDownList1.DataTextField =   CountryName; 
 DropDownList1.DataValueField =   CountryId; 
 DropDownList1.DataBind（）; `
 < /   country  >  < /   list  >  < /   country  >  

这里 DropDownList1 是Dropdownlist的ID属性值

i have Json Data in Below Format

[{"CountryId":"India","CountryName":"India"},{"CountryId":"Pakisthan","CountryName":"Pakisthan"},{"CountryId":"USA","CountryName":"USA"}]

How can i bind this data into dropdown list

解决方案

Step 1: Declare a custom class

public class Country
{
    public string CountryId { get; set; }
    public string CountryName { get; set; }
}

Step 2: Deserialize the Json data and bind it to Dropdown

string jsonData = ""; // Assign JSON data to variable

// Create JavascriptSerializer object
JavaScriptSerializer jsSerializer = new JavaScriptSerializer();
List<country> countryList = jsSerializer.Deserialize<list><country>>(jsonData);

// Binding data to dropdownlist
DropDownList1.DataSource = countryList;
DropDownList1.DataTextField = "CountryName";
DropDownList1.DataValueField = "CountryId";
DropDownList1.DataBind(); `
</country></list></country>

Here DropDownList1 is value of ID attribute of Dropdownlist

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