C# 如何使用StreamWriter编写特殊字符（é；、è；）？

我的问题是：我想用StreamWriter编写数据（我的字符串包含字母e和è），但它不起作用。没有这些字母，它就可以工作

错误：无法关闭流

我的代码：

 string postString = "id=" + sIdTransaction + "&nom=" + sNom + "&prenom=" + sPrenom + "&email=" + sEmail + "&adresse.rue=" + sRue + "&adresse.codePostal=" + sCodePostal + "&adresse.ville=" + sVille;
string sIdContractant = "";
Encoding iso = Encoding.GetEncoding("utf-8");
Encoding utf8 = Encoding.UTF8;
byte[] utfBytes = utf8.GetBytes(postString);
byte[] isoBytes = Encoding.Convert(utf8, iso, utfBytes);
postString = iso.GetString(isoBytes);

string sUrlAuth = "https://test.contralia.fr/Contralia/api/transactions/" + sIdTransaction + "/contractant/";
HttpWebRequest webRequest = CreationRequete(sUrlAuth);
webRequest.ContentLength = postString.Length;


StreamWriter requestWriter = new StreamWriter(webRequest.GetRequestStream());
requestWriter.Write(postString);
requestWriter.Close();

adresse.Ville=Fercé（这个问题）

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请问我如何解决这个问题
谢谢

设置StreamWriter的编码：

StreamWriter sw = new StreamWriter(webRequest.GetRequestStream(), encoding)

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试试这个，我希望有帮助。这对我有用

将代码替换为以下内容：

string postString = "id=" + sIdTransaction + "&nom=" + sNom + "&prenom=" + sPrenom + "&email=" + sEmail + "&adresse.rue=" + sRue + "&adresse.codePostal=" + sCodePostal + "&adresse.ville=" + sVille;
string sIdContractant = "";
Encoding iso = Encoding.GetEncoding("utf-8");
Encoding utf8 = Encoding.UTF8;
byte[] utfBytes = utf8.GetBytes(postString);
byte[] isoBytes = Encoding.Convert(utf8, iso, utfBytes);
postString = iso.GetString(isoBytes);

string sUrlAuth = "https://test.contralia.fr/Contralia/api/transactions/" + sIdTransaction + "/contractant/";
HttpWebRequest webRequest = CreationRequete(sUrlAuth);
webRequest.ContentLength = postString.Length;


StreamWriter requestWriter = new StreamWriter(webRequest.GetRequestStream(), iso);
requestWriter.Write(postString);
requestWriter.Close();

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我只是在您的第11行中，

StreamWriter requestWriter=newstreamwriter（webRequest.GetRequestStream（））
由
StreamWriter requestWriter=新的StreamWriter（webRequest.GetRequestStream（），iso）
您确定这行代码：Encoding iso=Encoding.GetEncoding（“utf-8”）？它不应该是“iso-8859-1”吗？这是我的第一个想法，但不是解决方案。