how to make a login page

Question

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SQL-server-2000

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A.O.A
hi,
i'm having a problem while checking userid in login table
can anyone tell me what i' doing wrong?

//table
PK	TID	        numeric	9	0
FK	EID	        numeric	9	0
	UserID	        varchar	50	1
	Password	    varchar	16	1
	Verification_key  varchar	50	1
	Verified          varchar	50	1

ASP.NET

//html code
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="server">
    <asp:Panel ID="pnlLogin" runat="server">
        <table>
            <tr>
                <td>
                    <asp:Label ID="lblMessage" Text="" runat="server"></asp:Label>
                </td>
            </tr>
            <tr>
                <td>
                    User Id :
                </td>
                <td>
                    <asp:TextBox ID="txtUserId" runat="server" Font-Names="Segoe UI" Font-Size="10pt">
                    </asp:TextBox>
                    <asp:RequiredFieldValidator ID="UserIDRequiredFieldValidator" runat="server" ErrorMessage="User ID must be given"
                        ControlToValidate="txtUserId">
                    </asp:RequiredFieldValidator>
                    <cc1:TextBoxWatermarkExtender ID="UserIdTextBoxWatermarkExtender"  runat="server"
                        TargetControlID="txtUserId" WatermarkCssClass="watermark" WatermarkText="UserId">
                    </cc1:TextBoxWatermarkExtender>
                </td>
            </tr>
            <tr>
                <td>
                    Password:
                </td>
                <td>
                    <asp:TextBox ID="txtPassword" runat="server" TextMode="Password" Font-Names="Segoe UI"
                        Font-Size="10pt">
                    </asp:TextBox>
                    <asp:RequiredFieldValidator ID="PasswordRequiredFieldValidator" runat="server" ErrorMessage="Password cannot be empty"
                        ControlToValidate="txtPassword">
                    </asp:RequiredFieldValidator>
                </td>
            </tr>           
            <tr>
                <td colspan="2">
                    <asp:Button ID="cmdLogin" runat="server" Text="Login" OnClick="cmdLogin_Click" />
                </td>
            </tr>
        </table>
    </asp:Panel>

C#

//C# code of login button click

protected void cmdLogin_Click(object sender, EventArgs e)
        {
                int result = 0;
                string sSQL = "", UserID = "", Password = "";

                UserID = txtUserId.Text;
                Password = txtPassword.Text;

                sSQL = "select Tid from employee_login where UserID = '" + UserID + "'  ";
                

//---------------class munshi is defined below
                result = munshi.executeQuery(sSQL);
                if (result > 0)
                {
                    lblMessage.Text = "Welcome :" + UserID ;
                }
                else
                {
                    lblMessage.Text = "User id or password is incorrect!";
                }


}

public class munshi
{
public static int executeQuery(string qry)
    {
        int resultInt = 0;
        string ConnStr = ConfigurationManager.ConnectionStrings["HRFramework"].ConnectionString;
        SqlConnection aConnection = new SqlConnection(ConnStr);
        SqlCommand aCommand = new SqlCommand(qry, aConnection);
        aConnection.Open();
        try
        {
            resultInt = aCommand.ExecuteNonQuery();
        }
        catch (Exception)
        {
            //string ne = exi.Message;
            resultInt = -1;
        }
        finally
        {
            aConnection.Close();
            aCommand.Dispose();
        }

        return resultInt;
    }
}

while debuging.....

C#

resultInt = aCommand.ExecuteNonQuery();

resultint is returning -1,

Posted 10-Jan-12 0:43am

zainknoman

Updated 10-Jan-12 0:49am

v3

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Comments

Suraj S Koneri 10-Jan-12 6:45am

Please make your code as readable using C# and html code blocks,
No one can read this and understands to answer.

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devbtl · Answer 1 · 2012-01-10T00:46:00

Solution 1

SQL

select Tid from employee_login where UserID = '" + UserID + "' and password=' " txtpassword.text"'

";

Posted 10-Jan-12 0:46am

devbtl

uspatel · Answer 2 · 2012-01-10T00:48:00

Sample code for login button

C#

protected void btnsub_Click(object sender, EventArgs e)
    {


        try
        {
            string str = "select name,responsibility,remark,UserType,Deptt,emailid from empbirth where UserID=@userid and password=@pass";
            SqlCommand cmd = new SqlCommand(str, Db.GetConnection());
            cmd.Parameters.AddWithValue("userid", txtUId.Text);
            cmd.Parameters.AddWithValue("pass", txtpwd.Text);
            SqlDataReader dr = cmd.ExecuteReader();

            if (dr.Read())
            {
                Session["name"] = dr["name"].ToString();
                Session["userid"] = txtUId.Text;
                Session["resp"] = dr["responsibility"].ToString();
                Session["remark"] = dr["remark"].ToString();
                Session["tag"] = dr["UserType"].ToString();
                Session["deptt"] = dr["Deptt"].ToString();
                Session["password"] = txtpwd.Text;
                Session["emailid"] = dr["emailid"].ToString();
                cmd.Connection.Close();
              
                Response.Redirect("Home.aspx");
                
            }
            else
            {
               
                Label1.Text = "Wrong Id or Password / Not in DataBase";
                cmd.Connection.Close();
            }

        }

Suggestion:do not use query like

C#

sSQL = "select Tid from employee_login where UserID = '" + UserID + "'  ";

to prevent from SQL Injection.

incaunu · Answer 3 · 2012-01-10T00:49:00

Hello,

SqlCommand.ExecuteNonQuery Method

Return Value
Type: System.Int32
The number of rows affected.

For UPDATE, INSERT, and DELETE statements, the return value is the number of rows affected by the command. When a trigger exists on a table being inserted or updated, the return value includes the number of rows affected by both the insert or update operation and the number of rows affected by the trigger or triggers. For all other types of statements, the return value is -1. If a rollback occurs, the return value is also -1.

You may wanna try:
SqlCommand.ExecuteScalar Method

how to make a login page

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