'SampleDataContext.passwrdchange（long？，string，string，ref char？）'的最佳重载方法匹配有一些无效的参数

本文介绍了'SampleDataContext.passwrdchange（long？，string，string，ref char？）'的最佳重载方法匹配有一些无效的参数的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我有以下代码： -

I've the following code :-

protected void BtnSave_Click(object sender, EventArgs e) { using (SampleDataContext dbContext = new SampleDataContext()) { System.Nullable<char> outpt = null; long id = Convert.ToInt64(Session["USERID"]); dbContext.passwrdchange(id, old.Text.ToString().Trim(), newpass.Text.ToString().Trim(), ref outpt); if(outpt.ToString()=="T") { ClientScript.RegisterStartupScript(this.GetType(), "SuccessMsg", "<script>alert('Password Changed Successfully')</script>"); } else { ClientScript.RegisterStartupScript(this.GetType(), "ErrorMsg", "<script>alert('Old Password Does Not Match with Records.')</script>"); } } }

和我的Sample.designer.cs我有代码： -

and in my Sample.designer.cs I've the code :-

private void UpdateUser_Information(User_Information obj) { this.passwrdchange(((System.Nullable<long>)(obj.ID)), default(string), default(string),default(System.Nullable<char>)); }

现在当我编译它时会出错： - 1.

Now when I compile it gives the error :- 1.

The best overloaded method match for 'SampleDataContext.passwrdchange(long?, string, string, ref char?)' has some invalid arguments

2.

2.

Argument 4 must be passed with the 'ref' keyword

请帮助。我不明白该怎么做。

Please Help. I don't understand what to do.

推荐答案

你期待 You expect Nullable<long>, string, string, ref Nullable<char></char></long>

但是通过

But pass

long, string, string, ref Nullable<char></char>

问题在于长 - Nullable< long> ...

The problem is with the long - Nullable<long>...