You have to find the form and call the method, e.g. using System.Linq; … Application.OpenForms .OfType<Form1>() // Among the all opened forms of Form1 type .LastOrDefault() // Take the last one (or null if there’s no such form) ?.AfterConnect(); // And call AfterConnect() on it (if the form has been found)
Here label1 is a Label That you placed in the UI, And you are trying to assign a string value to that control. Such assignment is not valid and not permitted. Your requirement is to assign alPos as the Text property of the Label Control. So your query should be like the following: label1.Text = … Read more
I believe what you want is this: Process p = new Process(); ProcessStartInfo psi = new ProcessStartInfo(“cmd.exe”); // add /C for command, a space, then command psi.Arguments = “/C dir”; p.StartInfo = psi; p.Start(); The above code allows you to execute the commands directly in the cmd.exe instance. For example, to launch command prompt and … Read more
Just create picture box at runtime on form load like this. And you have to only increament x and y value after every cycle private void Form1_Load(object sender, EventArgs e) { int x = 10, y = 10; string[] file = System.IO.Directory.GetFiles(@”C:\Users\Public\Pictures\Sample Pictures\”, “*.jpg”); PictureBox[] pb = new PictureBox[file.Length]; for (int i = 0; i … Read more
This is a working example of reading a text file per stream to accomplish what you are trying to do. I have tested it with a 100 MB text file, and it worked well, but you have to see if larger files work as well. This is the example. Just bring a RichTextBox to your … Read more
Maybe this can work: public static bool IsProgramRunning(string TitleOfYourForm) { bool result = false; Process[] processes = Process.GetProcesses(); foreach (Process p in processes) { if (p.MainWindowTitle.Contains(TitleOfYourForm)) { result = true; break; } } return result; } Call this function in the Main function(before opening the mainForm), if it is false Application.Exit() else show your form.. … Read more
You could design your database table using an IDENTITY column. The database will assign a next value for the inserted row. You can access the value using one of: SCOPE_IDENTITY, @@IDENTITY or IDENT_CURRENT. More can be found here: MSDN-Identity. To know the difference between SCOPE_IDENTITY and @@IDENTITY see here.
As I said in the comment, with Multiline=True and WordWrap=True, your textbox will display a long line as multilines (Wrapped)… but actually it is one single line, and that’s why your Lines.Length=1, try type in some line break yourself, and test it again. Or you can set WordWrap=False, and you will see there is only … Read more
Classes that descend from Control have a Text property you can set for this, and a Button is one of those.. Some controls like Button and Label have a Text that isn’t set by the user, only the developer. Others (TextBox) are user editable, and you’d read from the Text property to find out what … Read more
It seems you have to implement the following logic: If there’s an opened Form2 instance, close it Otherwise create and show the new Form2 instance. If it’s your case we should look for the opened Form2 instance(s) first; and only then create it with new (if required) using System.Linq; … // Search: do we have … Read more