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hi,
Thank you
With Regards
Prasad
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hi!!
i had been refering to article 'passing values betn forms'.
I tried from it, but still i cant pass my variable from form1 to form2.
I m getting error on passing my variable to the other form's variable.
i have used the object approach from that article :
http://www.codeproject.com/useritems/pass_data_between_forms.asp
Objects of forms are created properly.
This i have written in form1 :
p = ((form1)log).n;
// log is object of form2.
//variable 'n' i have to bring from form2,which contains a date from query fired.
but i m getting error :
'Object reference not set to an instance of an object.'
It would be v.nice if u could help on it.
Thanx.
-- modified at 6:22 Wednesday 21st February, 2007
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best way is write query on that form for getting date from database.
the code i sent is correct but this i checked on vb.net.
if possible i will send code again.bye..
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If u have time, till 2mrw eve. whenever u have time, just try it, i have done this:
This is in FORM1 :
public partial class detail_form : Form
{
public DateTime n;
....... ( ... this means other not related coding is done here.)
}
private void button1_Click(object sender, EventArgs e)
{
conn.Open();
string strQury = "";
strQury = "insert into dashboarddealerlogin (logoutdatetime) values '(" + DateTime.Now + ")'";
SqlCommand cm = new SqlCommand(strQury, conn);
n = Convert.ToDateTime(cm.ExecuteScalar());
conn.close();
}
In FORM2 :
public partial class login : Form
{
DateTime p;
.........
}
private void login1_Click(object sender, EventArgs e)
{
SqlCommand cmd = new SqlCommand();
conn.Open();
cmd.Connection = conn;
......
p = ((detail_form)log).n;
.........
}
I have to use this 'p' in FORM2 function :
public void funEntrylogin(int strlogid, int strdashid, string strname, string strpwd, DateTime logindate, DateTime logoutdate)
in place of 'logoutdate'.
This is my full code.
Plz chek n try it wen u have time,i'll wait.
Thanx Nekshan.
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i m gng now i'll chek 2mrw.
thanx.
Sorry for disturbing you soo much.
Nekshan.
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yes i did, But i m getting errors and its still not working.
Still trying.
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Why do you keep creating new threads about the same question all the time?
I have already explained exactly why your code is not working. I have also told you before that I already have explained why your code is not working.
Would you please read my reply before creating any more threads about this?
---
single minded; short sighted; long gone;
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' i don't know which form is execute first
' what u do temperory
' first the form which is execute first write , first insert the values in database by using insert into tablename .... like wise.
' the information which u have only send in that function and leave it blank other field right. eg. insert into user (userid,password) values('viru_dram','hello')
' then in other form update the inserted value in database using eg.update tablename set timeout = system.datetime.now where userid='viru_dream' ....
'get it?. i will send u solution withing 2 days ok.bye.
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Happy B'day!! 
Form2 is execute first,its a login form.
After 'login' a 'grid form' opens,it has a logout button, on logout that datetime value must go in a table.
Thanx.
Take care
Enjoy d day!!
nekshan.
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Hi,
I was wondering how to access a method in a form from another form. I know that this implies using the 'static' modifier, however, this seems to be very troublesome.
I was thinking there should be a way to access the instance of a form at realtime to use one of it's public methods.. (The form of which the method I want to call happens to be the main form of the application) Does anyone know how to do this? I'm stuck
Actually I was considering using the Observer Pattern for solving this problem, however I expect there should be a much more straight-forward solution..?
With kind regards,
Johan Vandewalle
-- modified at 6:06 Wednesday 21st February, 2007
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motojojo wrote: I know that this implies using the 'static' modifier, however, this seems to be very troublesome.
No, it doesn't.
motojojo wrote: Actually I was considering using the Observer Pattern for solving this problem, however I expect there should be a much more straight-forward solution..?
The observer pattern is a good solution. You can get an example in this article about passing values between forms[^].
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I hope someone can come up with a better method, but here is how I solve that problem.
In the second form, make a new function (or put it in the form's constructor) which accepts a form as its argument and stores it in a local variable (perhaps called mainform). From Main(), call this function and pass the main form.
Now, to call something withing the main form's class just use: mainform.mymethod();
Mark
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thank you for your feedback guys I've worked around it
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Hi.
I need to add the following line to the Http Header of a request to a web service:
"Accept: application/dime"
Do you have any suggestion on how to achieve that?
Very important: I use WSE 2.0.
Thanks in advance.
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you can add some attribute as following :
HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create(Address);
req.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.1.4322)";
req.Timeout = 60000;
req.KeepAlive = false;
req.Timeout = 60000;
HttpWebResponse res = (HttpWebResponse)req.GetResponse();
System.Text.Encoding enc = System.Text.Encoding.Default;
System.IO.Stream sm = res.GetResponseStream();
System.IO.StreamReader sr = new System.IO.StreamReader(sm,enc);
string strInput = sr.ReadToEnd();
i hope to find your answer
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hi all i am creating a login page and my problem was,
sp returns value for Num_of_User = 1 but the returnParam will always got a returnParamValue = 0..
what is wrong with this code...
this my code...
CREATE TABLE NorthWindUsers
(UserID INT IDENTITY(1,1) NOT NULL,
UserName VARCHAR(50) NOT NULL,
Password VARCHAR(50) NOT NULL)
INSERT INTO NorthWindUsers
(UserName, Password)
VALUES ('sachin', 'tendulkar')
alter PROCEDURE sp_ValidateUser
(
@UserName VARCHAR(50) = Null,
@Password VARCHAR(50) = Null,
@Num_of_User INT = 0
)
AS
SET @Num_of_User = (SELECT COUNT(*) AS Num_of_User
FROM NorthWindUsers
WHERE UserName = @UserName AND Password = @Password)
Return @Num_of_User
private void btnSubmit_Click(object sender, System.EventArgs e)
{
int maxLoginAttempts = (int)Session["MaxLoginAttempts"];
if (Session["LoginCount"].Equals(maxLoginAttempts))
{
Response.Redirect("WebForm1.aspx?reason=maxloginattempts");
}
if(Page.IsValid)
{
if(DBConnection(txtusername.Text.Trim(),txtPassword.Text.Trim()))
{
FormsAuthentication.RedirectFromLoginPage(txtusername.Text, false);
}
else
{
lblMessage.Text = "Invalid Login Please Try again....";
}
}
}
private bool DBConnection(string txtUser,string txtPass)
{
//int a;
SqlConnection myConnection = new SqlConnection(ConfigurationSettings.AppSettings["connstr"]);
SqlCommand myCommand = new SqlCommand("sp_ValidateUser", myConnection);
myCommand.CommandType = CommandType.StoredProcedure;
SqlParameter objParam1;
SqlParameter objParam2;
SqlParameter returnParam;
objParam1 = myCommand.Parameters.Add("@UserName", SqlDbType.VarChar);
objParam2 = myCommand.Parameters.Add("@Password",SqlDbType.VarChar);
returnParam = myCommand.Parameters.Add ("@Num_of_User",SqlDbType.Int);
objParam1.Direction = ParameterDirection.Input;
objParam2.Direction = ParameterDirection.Input;
returnParam.Direction = ParameterDirection.ReturnValue;
objParam1.Value = "txtuser";
objParam2.Value = "txtPass";
//a = Convert.ToInt32(myCommand.Parameters["@num_of_User"].Value);
try
{
if(myConnection.State.Equals(ConnectionState.Closed))
{
myConnection.Open();
returnParam = myCommand.ExecuteNonQuery();
//Int32 rowCount = (Int32)catDA.InsertCommand.Parameters["@RowCount"].Value;
}
if((int)returnParam.Value < 1 )
{
int loginCount = (int)Session["LoginCount"];
loginCount += 1;
Session["LoginCount"] = loginCount;
lblMessage.Text = "Invalid Login";
return false;
}
else
{
myConnection.Close();
return true;
}
}
catch (Exception ex)
{
lblMessage2.Text = ex + "Error connecting to the database";
return false;
}
}
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There are too many problems with this.
wrote: @Num_of_User INT = 0
You have a parameter clash. You've defined this as a return value, yet here you are specifying it as an input parameter with a default value of zero.
wrote: objParam1.Value = "txtuser";
objParam2.Value = "txtPass";
This passes a string literal to the parameter, so the stored procedure will never get the value passed in to the method, so it will never find anything because it does not match what you inserted into the database.
wrote: if(myConnection.State.Equals(ConnectionState.Closed))
{
myConnection.Open();
This is redundant. The connection will always be closed as it is newly created.
Here is a simpler solution:
For something this simple, I'd use ExecuteScalar and get the value from the SELECT directly
SQL:
alter PROCEDURE ValidateUser
(
@UserName VARCHAR(50) = Null,
@Password VARCHAR(50) = Null
)
AS
SELECT COUNT(*)
FROM NorthWindUsers
WHERE UserName = @UserName AND Password = @Password
GO
The sp prefix was removed because in SQL Server this may clash with system stored procedures. If SQL Server sees a stored procedure call starting with sp it goes to the master database first.
C#
SqlConnection myConnection = new SqlConnection(ConfigurationSettings.AppSettings["connstr"]);
SqlCommand myCommand = new SqlCommand("ValidateUser", myConnection);
myCommand.CommandType = CommandType.StoredProcedure;
SqlParameter objParam1 = myCommand.Parameters.Add("@UserName", SqlDbType.VarChar);
SqlParameter objParam2 = myCommand.Parameters.Add("@Password",SqlDbType.VarChar);
objParam1.Value = txtuser;
objParam2.Value = txtPass;
myConnection.Open();
int returnParam = (int)myCommand.ExecuteScalar();
myConnection.Close();
....
The direction was dropped, as all parameters are Input by default.
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i wanto encrypt a film and then write a program that only with this program my user can see that film...
what's the best solution for this ?
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That depends upon the level of security you want. There are several public domain encryption functions out there which are very good.
But from a practical viewpoint, if you aren't protecting something extremely valuable, just do something unexpected with the contents of the file. A very weak encryption. It still won't be worth anyone's time to try to figure it out.
For instance, for every group of 5 bytes in the file, reverse the order of those 5 bytes.
Mark
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Hi,
I'm writing a LoadGenerator application, in which for a specific period of time
certain no.of Threads are created and executes simultaneously..
That i call as RampUp threads.
After sleeping for a sustain period (10secs) of time.. I want to RampDown threads, that is i want to kill the threads one by one..
I have defined an ArrayList object alThreads to maintain the Threads list..
RampUp() method
public void RampUp()
{
for(int i=0; i<10; i++)
{
Thread thread = new Thread(ExecuteSingleThread);
thread.Start();
if(alThread.Contains(thread) == false)
{
alThreads.Add(thread);
}
Thread.Sleep(5000);
}
}
The below code kills the thread every five second..
RampDown() method
public void RampDown()
{
for(int i=0;i<alThread.Count;i++)
{
Thread thread = (Thread)alThreads[i];
if(thread.IsAlive)
thread.Abort();
Thread.Sleep(5000);
}
}
Now the problem is after killing the first thread, all the remaining threads
doesn't executes the code inside it..
Please help me..
regards,
nas
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Try looping through the threads from count-1 to 0...
Note that aborting a thread throws an exception which you need to catch.
<br />
for(int i=alThreads.length-1;i >= 0; i--)<br />
{<br />
Thread thread = (Thread)alThreads[i];<br />
if(thread.IsAlive)<br />
thread.Abort();<br />
Thread.Sleep(5000);<br />
}<br />
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Thanx ![Rose | [Rose]](https://codeproject.global.ssl.fastly.net/script/Forums/Images/rose.gif)
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Hi..
in my application i have implemented runtime compilatio of C# code..
its working fine..
Knowingly i made 7 to 8 mistakes in C# code and passed it to the CodeDomProvider's object..
after compilation it throws the errors.. but instead of displaying all the 7 errors.. it display only 4 errors.
i tried to set the capacity of the Errors list.. that is
objCompilerResults.Errors.Capacity = 100
but still gets the same.
Plz help me how to get all the errors.
regards,
nas
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