c# - 如何用 StreamWriter 写特殊字符（é，è）？

Question

我的问题：我想用 StreamWriter 写数据（我的字符串包含字母 é 和 è），但它不起作用。没有这个字母，它可以工作。

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（这个问题有问题）

请问我该如何解决这个问题？
谢谢

Answer 1

设置 StreamWriter 的编码：

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

试试这个，我希望它有帮助。它对我有用！

Answer 2

用这个替换你的代码：

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(), iso);
requestWriter.Write(postString);
requestWriter.Close();

我只是换行者，在你的第 11 行，StreamWriter requestWriter = new StreamWriter(webRequest.GetRequestStream());
由
StreamWriter requestWriter = new StreamWriter(webRequest.GetRequestStream(), iso);