I was trying to salt password in asp.net web application mysql but its shows this error.While running getting the error.Please anyone tell me the error?
Error:
Server Error in '/' Application.
Parser Error
Description: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately.
Parser Error Message: Could not load type 'DemoPage.Default'.
Source Error:
Line 1: <%# Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="DemoPage.Default" %>
Line 2:
Line 3: <!DOCTYPE html>
Source File: /Default.aspx Line: 1
Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.7.3163.0
Code default.aspx:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace WebPage1
{
public partial class _default : System.Web.UI.Page
{
MySql.Data.MySqlClient.MySqlConnection conn;
MySql.Data.MySqlClient.MySqlCommand cmd;
MySql.Data.MySqlClient.MySqlDataReader reader;
String queryStr;
String name;
protected void Page_Load(object sender, EventArgs e)
{
DoSQLQuery();
}
protected void submit_click(object sender, EventArgs e)
{
String connString = System.Configuration.ConfigurationManager.ConnectionStrings["WebAppConnString"].ToString();
conn = new MySql.Data.MySqlClient.MySqlConnection(connString);
conn.Open();
String queryStr = "";
cmd = new MySql.Data.MySqlClient.MySqlCommand("SELECT * FROM webapp.userregistration WHERE username = #name and password=#pas", conn);
cmd.Parameters.AddWithValue("#name", usernameTextBox.Text);
cmd.Parameters.AddWithValue("#pas", passwordTextBox.Text);
reader = cmd.ExecuteReader();
name = "";
while (reader.HasRows && reader.Read())
{
{
name = reader.GetString(reader.GetOrdinal("username")) + " " + reader.GetString(reader.GetOrdinal("password"));
}
//if the data matches the rows (username, password), then you enter to the page
if (reader.HasRows)
{
Session["uname"] = name;
Response.BufferOutput = true;
Response.Redirect("login.aspx", false);
}
else
{
passwordTextBox.Text = "invalid user";
}
}
reader.Close();
conn.Close();
}
private void DoSQLQuery()
{
try
{
}
catch (Exception e)
{
passwordTextBox.Text = e.ToString();
}
}
}
}
Related
This is my JSP coding, I am using link to redirect to JSP page :
Excel.jsp
<%#page import="java.sql.*"%>
<%#page import="java.sql.SQLException"%>
<%#page import="org.apache.poi.hssf.usermodel.*"%>
<%#page import=" java.io.*"%>
<%
String url = "jdbc:mysql://localhost:3306/";
String dbName = "login";
String driver = "com.mysql.jdbc.Driver";
String userName = "root";
String password = "";
try {
Class.forName("driver");
Connection con = DriverManager.getConnection("url + dbName", "userName",
"password");
Statement st = con.createStatement();
ResultSet rs = st.executeQuery("select * from openstock");
HSSFWorkbook workbook = new HSSFWorkbook();
HSSFSheet sheet = workbook.createSheet("fisocon");
HSSFRow rowhead = sheet.createRow((short) 0);
rowhead.createCell((short) 0).setCellValue("iname");
rowhead.createCell((short) 1).setCellValue("wname");
rowhead.createCell((short) 2).setCellValue("catname");
rowhead.createCell((short) 3).setCellValue("class");
rowhead.createCell((short) 4).setCellValue("unit");
rowhead.createCell((short) 5).setCellValue("nname");
int i = 1;
while (rs.next()){
out.println("hai2");
HSSFRow row = sheet.createRow((short) i);
row.createCell((short)
0).setCellValue(Integer.toString(rs.getInt("iname")));
row.createCell((short) 1).setCellValue(rs.getString("wname"));
row.createCell((short) 2).setCellValue(rs.getString("catname"));
row.createCell((short) 3).setCellValue(rs.getString("class"));
row.createCell((short) 4).setCellValue(rs.getString("unit"));
row.createCell((short) 5).setCellValue(rs.getString("nname"));
i++;
}
String yemi = "d:/xls/test.xls";
FileOutputStream fileOut = new FileOutputStream(yemi);
workbook.write(fileOut);
fileOut.close();
} catch (ClassNotFoundException e1) {
e1.printStackTrace();
}
catch (SQLException e1) {
e1.printStackTrace();
} catch (FileNotFoundException e1) {
e1.printStackTrace();
} catch (IOException e1) {
e1.printStackTrace();
}
%>
In this coding, createcell is strikeout. I don't know why it is.
There is no errors in coding. I also add poi 3.14 jar file in library.
My output page displays as empty. Please help me. Thanks in advance.
Page is empty because everything You made is outside of page.
BTW doing such in JSP is the worst idea.
Move this code to servlet, here is tip how to return binary data.
java servlet response returning data
Add
response.contentType = "application/vnd.ms-excel"
and JPS page should only have link
The additional effect: servlet code is more, more friendly to debugging.
Im tyring to send an email with my program to an gmx email. Every time I try to send the mail I get the same error message in my console.
What can be the solution for that?
The error message:
System.Net.Mail.SmtpException: SMTP server requiers secure connection or the client wasnt authenticated. server response was: authentication required.
in - System.Net.Mail.SendMailAsyncResult.End(IAsyncResult result)
in - System.Net.Mail.SmtpClient.SendMailCallback(IAsyncResult result)
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Net;
using System.Net.Mail;
using System.Net.Mime;
using System.Threading;
using System.ComponentModel;
namespace SMTP_Client
{
class Program
{
static bool mailSent = false;
private static void SendCompletedCallback(object sender, AsyncCompletedEventArgs e)
{
// Get the unique identifier for this asynchronous operation.
String token = (string)e.UserState;
if (e.Cancelled)
{
Console.WriteLine("[{0}] Send canceled.", token);
}
if (e.Error != null)
{
Console.WriteLine("[{0}] {1}", token, e.Error.ToString());
}
else
{
Console.WriteLine("Message sent.");
}
mailSent = true;
}
public static void Main(string[] args)
{
SmtpClient client = new SmtpClient("smtp.gmx.com",25);
MailAddress from = new MailAddress("example#project.com", "me " + (char)0xD8 + " you", System.Text.Encoding.UTF8);
MailAddress to = new MailAddress("example#gmx.com");
MailMessage message = new MailMessage(from, to);
message.Body = "The project has succeeded ";
message.Subject = "made it!";
client.SendCompleted += new SendCompletedEventHandler(SendCompletedCallback);
string userState = "test message2\n";
client.SendAsync(message, userState);
Console.WriteLine("Sending message... press c to cancel mail. Press any other key to exit.");
string answer = Console.ReadLine();
if (answer.StartsWith("c") && mailSent == false)
{
client.SendAsyncCancel();
}
message.Dispose();
Console.WriteLine("proccess ended.");
}
}
}
using System;
using MySql.Data.MySqlClient;
namespace test2 {
class Program {
static void Main(string[] args) {
string connectionString = "Server=localhost;Database=login;Uid=root;Pwd=TheDarkest;";
MySqlConnection connection = new MySqlConnection(connectionString);
connection.Open();
}
}
}
The exception occurs at connection.Open(). I cannot seems to find the solution though I looked everywhere.
Btw I can connect to the database using python.
Add try/catch block until database connection is closed in your code.
Like ,
static void Main(string[] args) {
try{
......
string connectionString ="Server=localhost;Database=login;Uid=root;Pwd=TheDarkest;";
MySqlConnection connection = new MySqlConnection(connectionString);
connection.Open();
.......
}
catch(Exception e)
{
....
}
Im trying to connect my mobile to PC database using this code:
string cString = #"Persist Security Info=False;Integrated Security=false;Initial Catalog=myDB;server=192.168.1.11,1433\SqlExpress";
SqlConnection connection = new SqlConnection(cString);
connection.Open();
using (SqlCommand cmd = new SqlCommand("SELECT name1 FROM Product", connection))
{
using (SqlDataReader rdr = cmd.ExecuteReader())
{
while (rdr.Read())
{
t.Text += rdr.GetString(rdr.GetOrdinal("name1")) + System.Environment.NewLine;
}
}
}
Unfortunately I'm getting error: "Input string was not in the correcr format", source: mscorlib.
I know that there's error in connectionString (throwin exception after connection.Open())
Any ideas? Thanks in advance!
your current Culture is not in correct format
protected override void OnResume()
{
base.OnResume();
//Here you would read it from where ever.
var userSelectedCulture = new CultureInfo("en-US");
Thread.CurrentThread.CurrentCulture = userSelectedCulture;
}
Connection must be valid and open. where is the problem ? .net Frmework version 2.0
Connection must be valid and open. where is the problem ? .net Frmework version 2.0
Connection must be valid and open. where is the problem ? .net Frmework version 2.0
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Security.Cryptography;
using MySql.Data.MySqlClient;
namespace Student_Portal_Password
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
public static string GetMd5Hash(string input)
{
MD5 md5Hash = MD5.Create();
// Convert the input string to a byte array and compute the hash.
byte[] data = md5Hash.ComputeHash(Encoding.UTF8.GetBytes(input));
// Create a new Stringbuilder to collect the bytes
// and create a string.
StringBuilder sBuilder = new StringBuilder();
// Loop through each byte of the hashed data
// and format each one as a hexadecimal string.
for (int i = 0; i < data.Length; i++)
{
sBuilder.Append(data[i].ToString("x2"));
}
// Return the hexadecimal string.
return sBuilder.ToString();
}
public void check()
{
if (txtid.Text == "")
{
MessageBox.Show("Please enter Student ID ", MessageBoxIcon.Warning.ToString(), MessageBoxButtons.OK);
}
else if (txtpassword.Text == "")
{
MessageBox.Show("Please enter new password", MessageBoxIcon.Warning.ToString(), MessageBoxButtons.OK);
}
}
private void button1_Click(object sender, EventArgs e)
{
try
{
//check();
txtpassword.Text.Trim();
string hash = GetMd5Hash(txtpassword.Text);
string db = "server=localhost;uid=root;password=usbw;database=dum;";
MySqlConnection dbcon = new MySqlConnection(db);
MySqlCommand cmd = new MySqlCommand(db);
dbcon.Open();
cmd.CommandText = "SELECT * FROM members;";
cmd.ExecuteNonQuery();
MessageBox.Show("Success!");
dbcon.Close();
}
catch (MySqlException ex)
{
MessageBox.Show(ex.Message);
}
}
private void txtid_KeyPress(object sender, KeyPressEventArgs e)
{
const char Delete = (char)8;
e.Handled = !Char.IsDigit(e.KeyChar) && e.KeyChar != Delete;
}
}
}
A couple of things;
You're using ExecuteNonQuery for a Query. Try for example ExecuteReader instead.
You're not setting a connection for your DbCommand, so executing it won't find the database.
Try this instead;
MySqlConnection dbcon = new MySqlConnection(db);
string sql = "SELECT * FROM members";
MySqlCommand cmd = new MySqlCommand(sql, dbcon); //<-- pass connection to command
Your current code;
MySqlCommand cmd = new MySqlCommand(db);
...passes in the connection string as the SQL to execute, and does not associate the command with any database connection. That will give the error you're asking about.