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(..))
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
与罗斯托夫的帖子一样,如果你不想包含对系统的引用。在你的项目中,你可以使用System.Net.Http.Formatting中的FormDataCollection,然后做如下的事情:
使用System.Net.Http.Formatting.FormDataCollection
var parameters = new Dictionary<string, string>()
{
{ "ham", "Glaced?" },
{ "x-men", "Wolverine + Logan" },
{ "Time", DateTime.UtcNow.ToString() },
};
var query = new FormDataCollection(parameters).ReadAsNameValueCollection().ToString();
其他回答
我找不到比创建一个扩展方法来将Dictionary转换为QueryStringFormat更好的解决方案。Waleed A.K.提出的解决方案也不错。
遵循我的解决方案:
创建扩展方法:
public static class DictionaryExt
{
public static string ToQueryString<TKey, TValue>(this Dictionary<TKey, TValue> dictionary)
{
return ToQueryString<TKey, TValue>(dictionary, "?");
}
public static string ToQueryString<TKey, TValue>(this Dictionary<TKey, TValue> dictionary, string startupDelimiter)
{
string result = string.Empty;
foreach (var item in dictionary)
{
if (string.IsNullOrEmpty(result))
result += startupDelimiter; // "?";
else
result += "&";
result += string.Format("{0}={1}", item.Key, item.Value);
}
return result;
}
}
和他们:
var param = new Dictionary<string, string>
{
{ "param1", "value1" },
{ "param2", "value2" },
};
param.ToQueryString(); //By default will add (?) question mark at begining
//"?param1=value1¶m2=value2"
param.ToQueryString("&"); //Will add (&)
//"¶m1=value1¶m2=value2"
param.ToQueryString(""); //Won't add anything
//"param1=value1¶m2=value2"
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"));
避免taras中描述的双重编码问题。roshko的答案,并保持容易使用查询参数的可能性,你可以使用uriBuilder.Uri.ParseQueryString()而不是HttpUtility.ParseQueryString()。
对于那些不想包括系统。Web在项目中还没有使用它,你可以使用System.Net.Http的FormUrlEncodedContent,并做如下的事情:
keyvaluepair版本
string query;
using(var content = new FormUrlEncodedContent(new KeyValuePair<string, string>[]{
new KeyValuePair<string, string>("ham", "Glazed?"),
new KeyValuePair<string, string>("x-men", "Wolverine + Logan"),
new KeyValuePair<string, string>("Time", DateTime.UtcNow.ToString()),
})) {
query = content.ReadAsStringAsync().Result;
}
字典的版本
string query;
using(var content = new FormUrlEncodedContent(new Dictionary<string, string>()
{
{ "ham", "Glaced?"},
{ "x-men", "Wolverine + Logan"},
{ "Time", DateTime.UtcNow.ToString() },
})) {
query = content.ReadAsStringAsync().Result;
}
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();
}
}