1
我在Fedora 25我以前
these instructions用的RPM我分發安裝DOTNET,因爲有在Fedora 25沒有正式使用的軟件包DOTNET
存在一切正常:DOTNET中的Fedora 25:</p> <p>:Web客戶端不System.Net
$ dotnet --version
1.0.0-preview2-1-003175
我想運行一個簡單的WebClient的例子,用Visual代碼創建:
using System;
using System.Net;
using System.Net.Http;
using System.Net.WebClient;
namespace ConsoleApplication
{
public class Program
{
public static void Main(string[] args)
{
using (var webClient = new WebClient())
{
var url = [someurl];
var htmlCode = webClient.DownloadData(url);
var base64 = Convert.ToBase64String(htmlCode);
}
}
}
}
請注意,我說的using
只陳述一個接一個,運行到這個問題:
$ dotnet build
Project cbsearchui_test (.NETCoreApp,Version=v1.1) will be compiled because expected outputs are missing
Compiling test_project for .NETCoreApp,Version=v1.1
/usr/lib64/dotnetcore/dotnet compile-csc
@test_project/obj/Debug/netcoreapp1.1/dotnet-
compile.rsp returned Exit Code 1
test_project/Program.cs(4,18): error CS0234:
The type or namespace name 'WebClient' does not exist in the namespace
'System.Net' (are you missing an assembly reference?)
Compilation failed.
0 Warning(s)
1 Error(s)
Time elapsed 00:00:00.6661503
這是我project.json
,由VS自動生成代碼:
{
"version": "1.0.0-*",
"buildOptions": {
"debugType": "portable",
"emitEntryPoint": true
},
"dependencies": {},
"frameworks": {
"netcoreapp1.1": {
"dependencies": {
"Microsoft.NETCore.App": {
"type": "platform",
"version": "1.1.0"
}
},
"imports": "dnxcore50"
}
}
}
我努力理解,如果這是有關我的具體Dotnet安裝和/或Fedora 25.類似的問題似乎是指compatibility issues,profiling,bad usage statement等,但它們都不適用於這個問題。
我也嘗試將依賴項更改爲netcoreapp
版本1.0.0而不是1.1.0,但仍然存在相同的錯誤。
據我所知,在2.0版本之前,WebClient不存在於dotnet核心中。 –
https://docs.microsoft.com/en-us/dotnet/api/system.net.webclient?view=netcore-2.0 –
只是不要使用WebClient,它已經過時了。它已被替換爲HttpClient,即使在Windows上的.NET Framework項目中也是如此 –