如果我想使用System.Net.HttpClient提交一个http获取请求，似乎没有api来添加参数，这是正确的吗?
是否有任何简单的api可用来构建查询字符串，不涉及构建名称值集合和url编码，然后最后连接它们? 我希望使用类似RestSharp的api(即AddParameter(..))
当前回答
我的答案与公认的答案/其他答案在全球范围内并无不同。我只是尝试为Uri类型创建一个扩展方法，它接受可变数量的参数。
public static class UriExtensions
{
public static Uri AddParameter(this Uri url, params (string Name, string Value)[] @params)
{
if (!@params.Any())
{
return url;
}
UriBuilder uriBuilder = new(url);
NameValueCollection query = HttpUtility.ParseQueryString(uriBuilder.Query);
foreach (var param in @params)
{
query[param.Name] = param.Value.Trim();
}
uriBuilder.Query = query.ToString();
return uriBuilder.Uri;
}
}
使用的例子:
var uri = new Uri("http://someuri.com")
.AddParameter(
("p1.name", "p1.value"),
("p2.name", "p2.value"),
("p3.name", "p3.value"));
其他回答
或者简单地使用我的Uri扩展
Code
public static Uri AttachParameters(this Uri uri, NameValueCollection parameters)
{
var stringBuilder = new StringBuilder();
string str = "?";
for (int index = 0; index < parameters.Count; ++index)
{
stringBuilder.Append(str + parameters.AllKeys[index] + "=" + parameters[index]);
str = "&";
}
return new Uri(uri + stringBuilder.ToString());
}
使用
Uri uri = new Uri("http://www.example.com/index.php").AttachParameters(new NameValueCollection
{
{"Bill", "Gates"},
{"Steve", "Jobs"}
});
结果
http://www.example.com/index.php?Bill=Gates&Steve=Jobs
您可能想看看Flurl[披露:我是作者]，这是一个流畅的URL构建器，带有可选的配套库，可以将其扩展为一个成熟的REST客户机。
var result = await "https://api.com"
// basic URL building:
.AppendPathSegment("endpoint")
.SetQueryParams(new {
api_key = ConfigurationManager.AppSettings["SomeApiKey"],
max_results = 20,
q = "Don't worry, I'll get encoded!"
})
.SetQueryParams(myDictionary)
.SetQueryParam("q", "overwrite q!")
// extensions provided by Flurl.Http:
.WithOAuthBearerToken("token")
.GetJsonAsync<TResult>();
查看文档了解更多细节。完整的软件包在NuGet上可用:
PM>安装包Flurl。Http
或者只是独立的URL构建器:
PM>安装包Flurl
感谢“Darin Dimitrov”，这是扩展方法。
public static partial class Ext
{
public static Uri GetUriWithparameters(this Uri uri,Dictionary<string,string> queryParams = null,int port = -1)
{
var builder = new UriBuilder(uri);
builder.Port = port;
if(null != queryParams && 0 < queryParams.Count)
{
var query = HttpUtility.ParseQueryString(builder.Query);
foreach(var item in queryParams)
{
query[item.Key] = item.Value;
}
builder.Query = query.ToString();
}
return builder.Uri;
}
public static string GetUriWithparameters(string uri,Dictionary<string,string> queryParams = null,int port = -1)
{
var builder = new UriBuilder(uri);
builder.Port = port;
if(null != queryParams && 0 < queryParams.Count)
{
var query = HttpUtility.ParseQueryString(builder.Query);
foreach(var item in queryParams)
{
query[item.Key] = item.Value;
}
builder.Query = query.ToString();
}
return builder.Uri.ToString();
}
}
由于我必须重用这几次，所以我提出了这个类，它只是帮助抽象查询字符串是如何组成的。
public class UriBuilderExt
{
private NameValueCollection collection;
private UriBuilder builder;
public UriBuilderExt(string uri)
{
builder = new UriBuilder(uri);
collection = System.Web.HttpUtility.ParseQueryString(string.Empty);
}
public void AddParameter(string key, string value) {
collection.Add(key, value);
}
public Uri Uri{
get
{
builder.Query = collection.ToString();
return builder.Uri;
}
}
}
使用将被简化成这样:
var builder = new UriBuilderExt("http://example.com/");
builder.AddParameter("foo", "bar<>&-baz");
builder.AddParameter("bar", "second");
var uri = builder.Uri;
将返回uri: http://example.com/?foo=bar%3c%3e%26-baz&bar=second
我的答案与公认的答案/其他答案在全球范围内并无不同。我只是尝试为Uri类型创建一个扩展方法，它接受可变数量的参数。
public static class UriExtensions
{
public static Uri AddParameter(this Uri url, params (string Name, string Value)[] @params)
{
if (!@params.Any())
{
return url;
}
UriBuilder uriBuilder = new(url);
NameValueCollection query = HttpUtility.ParseQueryString(uriBuilder.Query);
foreach (var param in @params)
{
query[param.Name] = param.Value.Trim();
}
uriBuilder.Query = query.ToString();
return uriBuilder.Uri;
}
}
使用的例子:
var uri = new Uri("http://someuri.com")
.AddParameter(
("p1.name", "p1.value"),
("p2.name", "p2.value"),
("p3.name", "p3.value"));
