ExecuteNonQuery C#和SQL Server

Question

这是我的错误:

System.Data.dll中出现"System.Data.SqlClient.SqlException"类型的异常,但未在用户代码中处理

附加信息:参数化查询'(@ username nvarchar(3),@ password nvarchar

这是我的表:

CREATE TABLE [dbo].[User] 
(
    [Username]  VARCHAR (250) NOT NULL,
    [Pasword]   VARCHAR (MAX) NOT NULL,
    [FName]     VARCHAR (MAX) NOT NULL,
    [LName]     VARCHAR (MAX) NOT NULL,
    [Location]  VARCHAR (MAX) NOT NULL,
    [Profesion] VARCHAR (MAX) NOT NULL,
    [email]     VARCHAR (MAX) NOT NULL,
    [gender]    VARCHAR (MAX) NOT NULL,
    [money]     INT           NOT NULL,
    [property]  VARCHAR (MAX) NULL,

    PRIMARY KEY CLUSTERED ([Username] ASC)
);

这是C#代码:

if (Page.IsValid)
{
    SqlCommand NewUser = new SqlCommand("INSERT INTO [User] Values (@username,@password,@name,@lastname,@location,@profesion,@email,@gender,@money,@pro);", c);
    NewUser.Connection = c;

    NewUser.Parameters.AddWithValue("@username", txtuser.Text);
    NewUser.Parameters.AddWithValue("@password", txtpass.Text);
    NewUser.Parameters.AddWithValue("@name", txtFName.Text);
    NewUser.Parameters.AddWithValue("@lastname", txtLName.Text);
    NewUser.Parameters.AddWithValue("@location", ddlcountry.SelectedItem.Text);
    NewUser.Parameters.AddWithValue("@profesion", txtprofession.Text);
    NewUser.Parameters.AddWithValue("@email", txtemail.Text);
    NewUser.Parameters.AddWithValue("@gender", rbgendere.SelectedItem.Text);
    NewUser.Parameters.AddWithValue("@money", 0);
    NewUser.Parameters.AddWithValue("@pro", null);

    Session["CurentUserid"] = txtuser.Text;

    c.Open();
    NewUser.ExecuteNonQuery();
    c.Close();

    Session["Conect"] = (bool)true;
    Response.Redirect("Finish Had Member.aspx", true);
}

请帮忙

Answer 1

我怀疑问题是你指定null的值@pro.来自以下文档AddWithValue:

使用DBNull.Value而不是null,表示空值.

但是,我还建议避免使用AddWithValue- 调用Add并指定参数类型,然后设置Value属性.例如:

NewUser.Parameters.Add("@money", SqlDbType.Int).Value = 0;

有关执行此操作的详细原因,请参阅此博客文章.