Re: Logical Expressions Evaluation... - C# Discussion Boards

Re: Bardcode reader query

23-Aug-06 5:01

Hello

No! In the logical OR -aka ||- once a condition is met, no further evaluation is carried out.

To demonstrate this do the following code:

private void MyMethod()
{
    int x = 3;
    if (x < 5 || Hello() == 7)
        return;
}

private int Hello()
{
    MessageBox.Show("Hello");
    return 5;
}

Now change the first condition to be false

private void MyMethod()
{
    int x = 3;
    if (x > 5 || Hello() == 7)
        return;
}

private int Hello()
{
    MessageBox.Show("Hello");
    return 5;
}

You'll see that the messageBox doesn't appear in the first case.

Regards Rose | [Rose]

Bardcode reader query

Rocky#23-Aug-06 4:19

Rocky#

23-Aug-06 4:19

hi

I want to know how we can use a barcode reader with C# and how we can get the values from it and store the in a database SQL Server 2000

thanks

Rocky

Nader Elshehabi23-Aug-06 4:51

Re: Bardcode reader query

23-Aug-06 4:51

Hello

Barcode readers usually act like keyboards. Once you press the button while pointing to a barcode, the value of the barcode will be written in the active control, wether it's the notepad, textbox, combobox, etc...

So, you won't need any special programming for barcoding, unless you want to print barcode, not read it. For only reading barcode, just make a textbox to receive the value as it would be written by a keyboard.

Regards Rose | [Rose]

Rocky#24-Aug-06 4:09

Rocky#

24-Aug-06 4:09

OK so that means I can get the price of an item thru a barcode reader just as if I'm entering the value from a key board. Gr8!thats fantastic.

Many thanks Nader! that's makes me feel a lot comfortable

Rocky

Connect to a remote server

pranu_1323-Aug-06 4:09

pranu_13

23-Aug-06 4:09

Hi all,

i need to connect to a remote server using c#.net.
The connection should be also able to access a sub database in a database.(HP9000)

Rather it should work like the Qcterm.

Using sockets i can only pass the port and IP address .
How will i pass the database name to be connected to and fetch data????????????

It would be a great help if someone has an answer.....

Thanks.

Re: Connect to a remote server

Nader Elshehabi23-Aug-06 4:47

Re: DataGridView WordWrap

23-Aug-06 4:47

Hello

This sounds much like Client/Server application. At the connecting machine there is a client app to connect to the server app in the "connected to" machine. Now the client app makes requests, and the server app fetches the data from the database -on the same machine-, and send it as a response to the client. It's possible using sockets.

What would be the problem with that?

Regards Rose | [Rose]

DataGridView WordWrap

kalyanPaladugu23-Aug-06 4:03

kalyanPaladugu

23-Aug-06 4:03

Iam developing a windows application. I have a dataGridView which has
rows. Inside a row in dataGridView i kept two lines. For doing this
i first did

dataGridView1.DefaultCellStyle.WrapMode = DataGridViewTriState.True;

and kept a new line character in the string

so if i have Mike and Bond to go in separate lines inside one row in dataGridView i would say "Mike"+"\n"+"Bond"

it worked and kept in separate lines but when i double click on the DataGridView row for some weird reason its again keeping back in single line
with some funny character between Mike and Bond

But when i leave the row it again puts back in two separate lines.

Did any body encountered this if yes how to solve this. I want them in Separate line always.

Thanks
Kal

Nader Elshehabi23-Aug-06 4:42

DataGridView Custom Column Control Events

23-Aug-06 4:42

Hello

To solve this issue either use "Mark\r\nBond", or "Mark" + Environment.NewLine + "Bond"

Regards Rose | [Rose]

Itanium23-Aug-06 2:50

23-Aug-06 2:50

I have created a custom datagridviewColumn control containig a TextBox+Button. I want to access the events of these controls directly, for example TextBox_textChanged, Button_MouseHover. following code has been written for this, but it is not working Confused | :confused:

        DXDataGridViewTextBoxButtonColumn btn = new DXDataGridViewTextBoxButtonColumn();<br />
            ((DXTextBoxButtonCell)btn.CellTemplate).SSTextBoxButton.Button.Click += new EventHandler(SSTextBoxButton_Enter);<br />
            ((DXTextBoxButtonCell)btn.CellTemplate).SSTextBoxButton.Enter += new EventHandler(SSTextBoxButton_Enter);<br />
<br />

I have simply shown a messagebox in its event handler.

Can anyone help?

sorry for my bad English.

Nader Elshehabi23-Aug-06 3:08

23-Aug-06 3:08

Hello

MyCustomControl control = new MyCustomControl(); //Includes a public member of type Button called MyButton
control.MyButton.Click += new EventHandler(MyHandler);

What's wrong with simplicity??!!

Regards Rose | [Rose]

Itanium23-Aug-06 6:01

23-Aug-06 6:01

I have to include the custom contorl in DataGridViewColumn, not the control it self.

sorry for my bad English.

Nader Elshehabi23-Aug-06 9:13

23-Aug-06 9:13

Hello

Let me get this right!! Your problem is that you made a custom control - TextBox & a Button-, and you want to display it in the header cell?? Or is it in all cells of the column??

Regards Rose | [Rose]

Itanium23-Aug-06 20:48

23-Aug-06 20:48

Hello,

Infact i want to display it in all cells. I have been succeded in doing that, Now i want to handle the event of that control. I have writeen the code in my first post. I dont know that y these events do not get triggered. Confused | :confused:

Let me make it simple, forget about custom control.

say i want to handle the events of button in DataGridViewButtonColumn, tell me how i will do that?

Thanx

sorry for my bad English.

Nader Elshehabi24-Aug-06 1:41

24-Aug-06 1:41

Hello

Now I got your problem... Actually custom DatagridView columns are inherited -after some fathers- from DataGridViewElemnt. In that class you will find protected methods called RaiseCellClick(), RaiseCellContentClick(), among other methods to raise the events DatagridView.CellClick event, and DataGridView.CellContentClick. So the control that will handle the events is the DataGridView actually by the above events. If your custom control doesn't fire these events automatically -I don't know how you implemented them!-, so when you see suitable fire them yourself using the Raise methods.

Regards Rose | [Rose]

Itanium24-Aug-06 3:52

24-Aug-06 3:52

Thanx Nader for your help

public override void InitializeEditingControl(int rowIndex, object<br />
           initialFormattedValue, DataGridViewCellStyle dataGridViewCellStyle)<br />
       {<br />
          ase.InitializeEditingControl(rowIndex, initialFormattedValue,<br />
               dataGridViewCellStyle);<br />
                         DXTextBoxButtonColumnEditingControl ctl =<br />
   DataGridView.EditingControl as DXTextBoxButtonColumnEditingControl;<br />
         if(ctl !=null)<br />
           if (this.Value != null)<br />
               ctl.SSTextBox.Text = (string)this.Value;<br />
           else<br />
               ctl.SSTextBox.Text = string.Empty;<br />
          }

i want this ctl to be accessed in the form where datagridcolumn will be used.

Thanx

sorry for my bad English.

Nader Elshehabi5-Sep-06 9:18