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我做了一个SQL Server表的注册页面,现在我想做一个注册页面。如何检查输入的值是否存在?C#&SQL Server:如何做登录检查
这里是我的代码块:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.SqlClient;
public partial class index : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void btnSignIN_Click(object sender, EventArgs e)
{
string str = "Data Source=(LocalDB)\\MSSQLLocalDB;";
str += "AttachDbFilename=|DataDirectory|Database.mdf;";
str += "Integrated Security= True";
string userName = txtUserNameLogIN.Text;
string password = txtPasswordLogIN.Text;
SqlConnection c = new SqlConnection(str);
SqlCommand cmd = new SqlCommand("SELECT UserName FROM [Table] WHERE [email protected]", c);
cmd.Parameters.AddWithValue("@userName", userName);
}
}
在这里,我不`吨知道该怎么办......
任何帮助将不胜感激。
谢谢!它为我工作 – D4NieLDev