Question

好的，我知道我是业余爱好者，最近我问了很多问题。我已修复它，因此无法将重复记录输入到我的sql server数据库。这是代码：

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; 
using System.Configuration;

public partial class Default2 : System.Web.UI.Page {
protected void Page_Load(object sender, EventArgs e)
{

}
protected void Button1_Click(object sender, EventArgs e)
{
 Guid newGUID = Guid.NewGuid();

 SqlConnection User = new SqlConnection("Data Source=CONNECTION STRING BLAH BLAH");
 {
    User.Open();
     string checkuser = "select count(*) from userdatabase where Username = @username";
     SqlCommand com = new SqlCommand(checkuser, User);
    com.Parameters.AddWithValue("@username", InputUsername.Text);
     int temp = Convert.ToInt32(com.ExecuteScalar().ToString());
     User.Close();
     if (temp == 1)
     {
     Response.Write("Username is already in use");
     }
     if (temp == 0)
     {

     SqlCommand xp = new SqlCommand("Insert into userdatabase(ID,Username, Email, Password, Fname, LName, Addl1, AddL2,
City, County, Postcode, Country, Company)Values(@ID, @Username,
@Email, @Password, @FName, @LName, @AddL1, @AddL2, @City, @County,
@Postcode, @Country, @Company )", User);
     xp.Parameters.AddWithValue("@ID", newGUID.ToString());
     xp.Parameters.AddWithValue("@Username", InputUsername.Text);
     xp.Parameters.AddWithValue("@Email", InputEmail.Text);
     xp.Parameters.AddWithValue("@Password", InputPassword.Text);
     xp.Parameters.AddWithValue("@FName", InputFname.Text);
     xp.Parameters.AddWithValue("@LName", InputSname.Text);
     xp.Parameters.AddWithValue("@AddL1", InputAddress1.Text);
     xp.Parameters.AddWithValue("@AddL2", InputAddress2.Text);
     xp.Parameters.AddWithValue("@City", InputCity.Text);
     xp.Parameters.AddWithValue("@County", InputState.Text);
     xp.Parameters.AddWithValue("@Postcode", InputPostcode.Text);
     xp.Parameters.AddWithValue("@Country", InputCountry.Text);
     xp.Parameters.AddWithValue("@Company",InputCompany.Text);


     User.Open();
     xp.ExecuteNonQuery();
     User.Close();
     }
     if (IsPostBack)
     {
     InputUsername.Text = "";
     InputPassword.Text = "";
     InputEmail.Text = "";
     VerifyPassword.Text = "";
     InputFname.Text = "";
     InputSname.Text = "";
     InputAddress1.Text = "";
     InputAddress2.Text = "";
     InputCity.Text = "";
     InputState.Text = "";
     InputPostcode.Text = "";
     InputCompany.Text = "";

     Response.Redirect("Login.aspx");

     }

 }


}

protected void TextBox2_TextChanged(object sender, EventArgs e)
{

} }

但是，正如您所看到的，我已将其设置为“用户名已在使用中”。但它不会显示它，也不会将数据输入到表中。它还将其重定向到login.aspx页面。有关停止页面重定向到新页面并显示消息的任何帮助吗？

修改

有人提到有关这个工作的尝试/捕获方法，有人能够向我解释这是如何工作的，我已经在YouTube上看了但我还没有找到任何可以帮助这个< / p>

消息未显示

0 个答案: