c# - 如何从 webreference 调用 CreateUser 方法

Question

我已经没有什么可以尝试的了，所以我希望有人能帮我解决这个问题。

我正在创建一个“注册”页面。当用户单击“注册”按钮时，他们的信息(电子邮件、用户名、密码)需要存储到 Access 数据库中。

我已经创建了一个 Web 引用 (http://localhost:36938/usconWebServices/membershipService.asmx) 并尝试调用 register.aspx.cs 中的“CreateUser”函​​数，但似乎无法正确调用。

这是我的 register.aspx.cs:

protected void btnRegister_Click(object sender, EventArgs e)
{
    wrefMembership.membershipService ws = new wrefMembership.membershipService();

    if (ws.CreateUser(txtEmailReg.Text, txtUsernameReg, txtPasswordReg))
    {

        try
        {
            Response.Redirect("mainContent.aspx");
        }
        catch (Exception er)
        {
            Response.Write("<b>Something really bad happened... Please try again.</b>");
        }
        finally
        {
            Response.Redirect("~/membersOnly/mainContent.aspx");
        }
    }
}

以“if...”开头的第 3 行给我一个错误:“No over for method 'CreateUser' takes 3 arguments.”我已经尝试取出参数以及整行，但仍然没有用。

下面是我的 membershipService.cs:

[WebMethod(Description = "Create a new user, pass on a user object, returns a result string with information about processing result")]
public string CreateUser(user newUser, string emailAddress, string username, string userPassword)
{
    string query = "";
    DataSet ds = new DataSet();
    DataRow dr;
    int count;
    string result = "";

    try
    {
        //define query
        query = "SELECT * FROM UserInfo WHERE emailAddress='" + newUser.emailAddress + "'";
        ds = DataAccessService.RunSimpleQuery(query);

        if (ds.Tables[0].Rows.Count <= 0)
        {
            dr = ds.Tables[0].NewRow();
            dr["emailAddress"] = newUser.emailAddress;
            dr["username"] = newUser.username;
            dr["userPassword"] = userPassword;
            dr["registerDate"] = DateTime.Now;
            ds.Tables[0].Rows.Add(dr);
            result = DataAccessService.RunInsertCommand(query, ds);

            try
            {
                ds = DataAccessService.RunSimpleQuery(query);
                count = ds.Tables[0].Rows.Count; //last row is the new row!
                if (count > 0)
                {
                    dr = ds.Tables[0].Rows[count - 1];
                    result = "[000] OK: userID=" + dr["userID"].ToString();
                }
                else
                {
                    result = "[004] ERROR: User ID not found"; //user ID not found
                }
            }
            catch (Exception ex)
            {
                result = "ERROR: Could not update database: " + ex.Message + " *** ";
            }
        }
        else
        {
            result = "[003] ERROR: This e-mail account has already been registered with us."; //e-mail account already exists
        }
    }
    catch (Exception ex)
    {
        result = "[002] ERROR: " + query + Environment.NewLine + ex.Message + ex.StackTrace; //error
    }

    return result;
}

如有任何帮助或建议，我们将不胜感激!

Answer 1

CreateUser() 函数需要四个参数(用户 newUser、字符串 emailAddress、字符串用户名、字符串 userPassword)。但是当您调用该方法时，您只传递了三个参数。

改变

if (ws.CreateUser(txtEmailReg.Text, txtUsernameReg, txtPasswordReg))

传递所有四个参数。

user newUser=new Users();
if (ws.CreateUser(newUser,txtEmailReg.Text, txtUsernameReg.Text, txtPasswordReg.Text))

显然您缺少第一个参数，即用户类的对象。

或者改变你的函数定义

public string CreateUser(user newUser, string emailAddress, string username, string userPassword)

到

public string CreateUser(string emailAddress, string username, string userPassword)

只接受三个参数