无法隐式转换类型'System.Collections.Generic.List [英] Cannot implicitly convert type 'System.Collections.Generic.List

问题描述

public List< spectruminfo> GetSpectrumBandList（uint StartTime）

{

List< spectruminfo> splist = new List< spectruminfo>（）;



using（System.Data.SqlClient.SqlConnection conn = new System.Data.SqlClient.SqlConnection（DbApi.ConnectionString） ）

{

conn.Open（）;

var spectrumItems = DbApi.GetSpectrumBandStartValue（conn，StartTime）;



foreach（SpectrumItems中的SpectrumItem项目）

{

SpectrumInfo spinfo = new SpectrumInfo（）;

spinfo.StartTime = item.startTime;

spinfo.BandStart = item.bandStart;

spinfo.PathId = item.pathId;

spinfo。 CellId = item.cellid;

splist.Add（spinfo）;

}



}

返回splist;

}

 var spectrumBandList = GetSpectrumBandList（（uint）StartTime）; 
 //matchInfo.Channels = new List <   int  > （）; 
 matchInfo.Channels = spectrumBandList; 
 
无法隐式转换类型'System.Collections.Generic.List <   ProView.Web。 Services.SpectrumInfo  > 'to'System.Collections.Generic.List <  < span class =code-leadattribute> int  > '

我得到错误（matchInfo.Channels = spectrumBandList;）。如何解决这个问题

解决方案

matchInfo.Channels的类型是什么。

如果它的类型是

 List< int> 

那么你就不能为它指定spectrumBandList。

你必须定义matchInfo。频道为

列表< spectruminfo> 

。

认真？

它告诉你究竟是什么问题是。

matchInfo.Channels的类型为System.Collections.Generic.List< int>你给它分配了一个值System.Collections.Generic.List< ProView.Web.Services.SpectrumInfo>



你需要设置一个不同的列表。

这是因为函数 GetSpectrumBandList（）返回一个包含 splist 的列表一个的列表SpectrumInfo

 ProView.Web.Services.SpectrumInfo 

这不能分配给整数列表，这就是你得到这样的错误的原因。你可以通过这样使用来避免这种情况：

 matchInfo.Channels =  new  List< spectruminfo>（）; < /   spectruminfo  >  

public List<spectruminfo> GetSpectrumBandList(uint StartTime)
{
List<spectruminfo> splist = new List<spectruminfo>();

using (System.Data.SqlClient.SqlConnection conn = new System.Data.SqlClient.SqlConnection(DbApi.ConnectionString))
{
conn.Open();
var spectrumItems = DbApi.GetSpectrumBandStartValue(conn, StartTime);

foreach (SpectrumItem item in spectrumItems)
{
SpectrumInfo spinfo = new SpectrumInfo();
spinfo.StartTime = item.startTime;
spinfo.BandStart = item.bandStart;
spinfo.PathId = item.pathId;
spinfo.CellId = item.cellid;
splist.Add(spinfo);
}

}
return splist;
}

var spectrumBandList = GetSpectrumBandList((uint)StartTime);
//matchInfo.Channels = new List<int>();
matchInfo.Channels = spectrumBandList;

Cannot implicitly convert type 'System.Collections.Generic.List<ProView.Web.Services.SpectrumInfo>' to 'System.Collections.Generic.List<int>'

I got error for (matchInfo.Channels = spectrumBandList;).how to solve this

解决方案

What is the type of matchInfo.Channels.
If its type is

List<int>

then you cannot assign spectrumBandList to it.
You have to define matchInfo.Channels as

List<spectruminfo>

.

Seriously?
It tells you exactly what the problem is.
matchInfo.Channels is of type System.Collections.Generic.List<int> and you're assigning it a value of System.Collections.Generic.List<ProView.Web.Services.SpectrumInfo>

You need to set a different list.

this is because the function GetSpectrumBandList() returns a list splist that contains a list of SpectrumInfo

ProView.Web.Services.SpectrumInfo

which cannot be assign to a list of integers that's why you are getting such error. you can avoid this by using like this :

matchInfo.Channels = new List<spectruminfo>();</spectruminfo>

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