在web api中接收base64字符串

我试图在我的web api web服务中接收base64字符串（这是一个映像）

我遇到的问题是字符串的长度，是否有一种方法可以设置传入字符串的限制以允许一个大尺寸的字符串？该字符串已编码以供url使用。据我所知，这是我的问题。现在如果我调用这个函数，它会给我一个404错误。但是，如果我删除Base64字符串并只放入一个普通字符串，它就会工作

这是我的职责

    public int userLogin(string identifier, string name, string hometown, string photo)
    {
        da = new SqlDataAdapter();
        ds = new DataSet();
        command = new SqlCommand("p_userLogin", connection);
        command.Parameters.AddWithValue("@userInfo", identifier);
        command.Parameters.AddWithValue("@name", name);
        command.Parameters.AddWithValue("@hometown", hometown);
        command.Parameters.AddWithValue("@photo", photo);
        command.CommandType = CommandType.StoredProcedure;
        da.SelectCommand = command;
        da.Fill(ds);
        int userID = Convert.ToInt32(ds.Tables[0].Rows[0][0]);
        return userID;
    }

这是我试图发送的基本64字符串

%2F9j%2F4AAQSkZJRgABAgAAAQABAAD%2F%2FgAEKgD%2F4gIcSUNDX1BST0ZJTEUAAQEAAAIMbGNtcwIQAABtbnRyUkdCIFhZWiAH3AABABkAAwApADlhY3NwQVBQTAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA9tYAAQAAAADTLWxjbXMAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAApkZXNjAAAA%2FAAAAF5jcHJ0AAABXAAAAAt3dHB0AAABaAAAABRia3B0AAABfAAAABRyWFlaAAABkAAAABRnWFlaAAABpAAAABRiWFlaAAABuAAAABRyVFJDAAABzAAAAEBnVFJDAAABzAAAAEBiVFJDAAABzAAAAEBkZXNjAAAAAAAAAANjMgAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAB0ZXh0AAAAAEZCAABYWVogAAAAAAAA9tYAAQAAAADTLVhZWiAAAAAAAAADFgAAAzMAAAKkWFlaIAAAAAAAAG%2BiAAA49QAAA5BYWVogAAAAAAAAYpkAALeFAAAY2lhZWiAAAAAAAAAkoAAAD4QAALbPY3VydgAAAAAAAAAaAAAAywHJA2MFkghrC%2FYQPxVRGzQh8SmQMhg7kkYFUXdd7WtwegWJsZp8rGm%2FfdPD6TD%2F%2F%2F%2FbAEMABQMEBAQDBQQEBAUFBQYHDAgHBwcHDwsLCQwRDxISEQ8RERMWHBcTFBoVEREYIRgaHR0fHx8TFyIkIh4kHB4fHv%2FbAEMBBQUFBwYHDggIDh4UERQeHh4eHh4eHh4eHh4eHh4eHh4eHh4eHh4eHh4eHh4eHh4eHh4eHh4eHh4eHh4eHh4eHv%2FCABEIADwAZAMAIgABEQECEQH%2FxAAcAAABBAMBAAAAAAAAAAAAAAAAAQMEBwIFBgj%2FxAAYAQADAQEAAAAAAAAAAAAAAAAAAQMCBP%2FEABgBAAMBAQAAAAAAAAAAAAAAAAABAwIE%2F9oADAMAAAERAhEAAAG3QMTBFYY5alPBmA1LrcjxmXOxgKQAAAQEQQRHkMrWkgTVn3RGV6Nz2YFOQEAXAR5CHywdvHqbimW5qpU2HU1O5isaR9TJSdjax0iQETnpgrVY1xblUtZOsSR7mDcLkI%2Bdtb0WNq6Fd8N63KeI%2F8QAIRAAAgICAQUBAQAAAAAAAAAAAgMBBAAFBhAREhMwFCD%2F2gAIAQAAAQUC%2FkpgR9UNCKaAy7WU1fGXlE%2FDYWlpwthInOx8sPZ1pbou5bn4WIiVlArKuqGYaFjmmCFW%2Fg%2BO6S9hwMyEMPyygiFB8H2EVxZdhETdKwSR8Q0u9q3F%2FwAss11za5Lr1Ff5M5sMf7D1tit%2BWCoxm9upXREhzV8jfVGlvdbaH91TryKxNZn7QwXgYLcIwbRyWl5bA%2FJ%2FUbTxjpy8yXR97u0OdlZrSswsMYIiBWXkUvd2h7s97s97s%2F%2FEAB4RAAEEAgMBAAAAAAAAAAAAAAEAAhEgAyEQEhMx%2F9oACAECEQE%2FAeWgQssRUfVqFkLQLMdpPf2OqyvU0%2F%2FEABwRAAICAwEBAAAAAAAAAAAAAAABESECECASMf%2FaAAgBAREBPwHbRj1IvvMDRgiN2WemWWWf%2F8QAMhAAAQMCAQkHAwUAAAAAAAAAAQACAxEhEgQiMTIzQWFxkhATIDBCUVIjYqE0Q4GC0f%2FaAAgBAAAGPwLwlx0BYpRnOvyWrVFuEKXI3%2Bi7fJZE%2B3e2xekc1oq3g1Yg0Bn32XdElrvwnu3YD5Ir7oGjiB7BPpaprnNRqGurwVIxc63LyXU3XQdE4r6jgrLFbE4eTWeZkY%2B4ovhHeQONWOCoFiduTYpHCGfRhOg8vFR80bTxKLYyZiN40LDk%2BGEc6lF8kuJx3kpsL5o81raX4f7VWmiH9k4RysLn5ooVrBCOVwnjHyNx%2FKtlDY3fF5ov1MXV2ySgVNKJ1cmZRxBogWsgizw6laaAv2HX9Tr89CpGyCww1BufxwQb3VvdYfj4KCV3bHgOHE%2B5C2r%2BpbWTqUTTLJQvA1lqhOIa2w9kXGZ9z8ltpOpbaTqW2k6ltpOpf%2F%2FEACcQAQACAQMCBgIDAAAAAAAAAAEAESExQVEQkSBhcYGhwdHhMPDx%2F9oACAEAAAE%2FIfC4NBbMUtdjRse0YWj5SUimsVHjXf8AF5P4LlC3Jbj1XvLA4ZrLl%2BY1Lxq1ft%2BZaHjCl9xGZzlJvk8T14gYPGEjh0IbszAnB5IXsw2alkmQv60%2BvCvgZWrBMSrgCPX2pUz3KD3YFp1uMa6k9OSJcbAgA4OO8qhjiAz0Zek3tEHcfXVl9PIfAkwdwtDuY8TnnydpuixsrBEqqx0TcHMF6Jhng5QdXtA5%2BSYNlBhvL8p5geZfhn%2BJly4JPSHzSbpscMI7Yvf%2B6Sth6gZDi7zdw6Zhbidk6tNcMJaVL90dzvCsVtjdR8zAr3nlLgwbUHn02g5c2Q0DvMN%2BdKf3Izcqy0uXTirSZIIT2S7xRaUO00OU%2FdEf2iY%2FsT%2F%2F2gAMAwAAARECEQAAEP8AnYN%2BoCoX5k0IxmM%2F7BlVolzfNjP%2FxAAaEQEAAwEBAQAAAAAAAAAAAAABABEhEDEg%2F9oACAECEQE%2FEIPAUuBY%2BKjAXA0imzXztyoRE7MjwdTJdTJMqIOS%2Bf%2FEACARAAIABQUBAAAAAAAAAAAAAAABEBEhMeEgcZGh8EH%2F2gAIAQERAT8QiwRp1hKLsOqYregkJ%2FsCnMbIlBeeQ6bd4HMt7gSlt3g294Ni5wf%2FxAAnEAEAAgIABgICAgMAAAAAAAABABEhMUFRYXGBkRDwIKGxwdHh8f%2FaAAgBAAABPxD8bHBvyAtgSxubWaeyjq3OWmhRcWa5BGuE702QdPYj5fh%2BWLBlL3GAokoQq7dXgYYJuyUWKCqNrMBct19ib7rYxnGmY9RPIjrFx7qNJlNYUH8x%2FB3OmW8%2FjJkUoBss3jSnmAoWwqwwvHHq6hStcYl5NWiZyjeWGrZBwArVeX3DtqbgEUuQIPEflgkW35Ciyo7Zf1cIFq8yPv8AzGvE029aczugohlJgKoQa78%2FEfik06SiWQbYMy7BGLHsHL4gMPQBHKEsC1PEqUcDUxvtcBUBzdDnAkkL4UwK4bOJu%2Be%2Fhm0Uxt5VHo3t5%2B2IQxVlnJLe4J1imuUmbyK8C%2BssiZbu8VuFIDhX79QPiMEE2tf8QNTVZsL61sHKznGcZ7JWSigchks6B6VCjzgL6NBh8RtB77jjuODlgMIAlDSf1cGoiTwUbXGsNrdpqgAKcRoBCmkrYDTV3DM1O5T2Fd25g4SuNI9OxqACkmq5A4jCbarwqbiXHdl%2Fo8RcALYRTkcwgTUNq9x3BYURVZikFM1dPgiGZ1v%2FAHxRft94XAh3ojx6zGRwwGliiTcA5LTESZAtbwDiXeAq%2FwC8QFpj75gF%2Bn5hS%2Bn5n%2F%2FZ

---

如果您对此有任何意见，我们将不胜感激。

我不知道您是否得到了答案，因为这个问题很久以前就已经发布了

我也遇到了同样的问题，用 下面的链接可能会帮助您找到答案@Ken

---

您要在URL中发送吗？不作为

POST

参数？不，它是一个POST参数。我只是使用浏览器来测试该字符串的其他实例。