将列表转换为字符串 [英] coneverting list in to string

问题描述

我正在尝试以下操作，但出现错误无法将类型"string"隐式转换为"System.Collections.Generic.Dictionary< string，string>''''

I''m trying to do the follwoing but having an error " Cannot implicitly convert type ''string''to ''System.Collections.Generic.Dictionary<string,string>''"

public  Dictionary<string,> ReasonErrorCodeList
        {
            set
            {
                if (_list.Count> 0)
                {
                  foreach (KeyValuePair<string,> pair in _list)
                  {
                      _list.Add(pair.Key,"1234");
                         
                      
                  }
                  string x = _list.ToString();
                    //string y = _list.
                  infoMessage.Text = string.Format("the list is ",x);
                  infoPanel.Visible = true;
                }
            }
            
            get { 
                
           
                //_list.Add (infoMessage.Text,"ERR_OOOOO1");
                return infoMessage.Text;
            }
         
        }


        
          /// Auto-generated field.
         /// To modify move field declaration from designer file to code-behind file.
   
        protected global::System.Web.UI.WebControls.Literal infoMessage;

推荐答案

假定_list是Dictionary<string, string>，为什么要在其上调用ToString ?您认为这会给您带来什么?

同样在二传手中，您遍历字典并将项添加到自身(没有意义的事情).

get方法中的错误是显而易见的.如果期望的返回类型为Dictionary<>，则不能返回String .

Assuming _list is a Dictionary<string, string> why are you calling ToString on it? What do you think will that give you?

Also in the setter, you iterate through the dictionary and add items to itself (pointless thing to do).

The error in the get-method is obvious. You cannot return a String when the expected return type is a Dictionary<>.

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