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Category Archives: dialogs
Make the user enter a password to use a program in C#
The example Display a simple password dialog before a program starts in C# displays a simple password form. It compares the value entered by the user with a string inside the program to decide whether the user entered the right … Continue reading
Posted in cryptography, dialogs, programs
Tagged C#, C# programming, cryptography, decrypt, dialogs, encrypt, example, example program, password, programs, Windows Forms programming
1 Comment
Display reusable dialog forms in C#
The example Make a dialog with standard dialog features in C# shows the most common approach to making dialogs. Whenever it needs to display the dialog, the main program initializes a new instance of it and displays it. If the … Continue reading
Use the Filter property to select image files in C#
This example is mostly intended to make it easier to find these filters. I use them a lot and it’s a pain to have to recreate them every time I need them. When you click the Different Types button, the … Continue reading
Posted in controls, dialogs, image processing
Tagged bmp, C#, C# programming, controls, dialogs, example, example program, filter property, image files, image processing, images, jpg, picture files, pictures, png, tif, Windows Forms programming
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Use file dialog filters in C#
The OpenFileDialog and SaveFileDialog components have a Filter property that lets the user look for specific kinds of files. The property’s value should be a pipe symbol (|) separated list of alternating filter names and patterns. Each pattern can include … Continue reading
Display a simple password dialog before a program starts in C#
You might think that a program could start with a password form and then display its main form if the user enters a valid password. Unfortunately when the initial password form closes, it ends the whole application. A better approach … Continue reading
Posted in dialogs, forms, programs
Tagged dialog, DialogResult, dialogs, example, example program, forms, password, password dialog, PasswordChar, programs, Windows Forms programming
3 Comments
Display custom colors in the color selection dialog in C#
The color selection dialog can display custom colors in the 16 boxes on its lower left (see the picture). Your code can initialize those colors by setting the dialog’s CustomColors property to an array of integers representing the colors. One … Continue reading
Posted in dialogs, graphics
Tagged C#, C# programming, color dialog, color selection, custom colors, dialog, dialogs, example, example program, graphics, Windows Forms programming
1 Comment
Use value equality to compare font objects in C#
This example explains the difference between reference equality and value equality, and shows how you can test value equality for font objects. Reference equality asks whether two variables refer to the same object. In contrast, value equality asks whether two … Continue reading
Display a font selection dialog with an Apply button in C#
Sometimes an application displays a font selection dialog that has an Apply button. If you click that button, the application shows what it would look like if you accept the dialog’s current font. If you click OK, the dialog closes … Continue reading
Posted in dialogs, fonts
Tagged C#, C# programming, dialogs, example, example program, font dialog, font selection dialog, fonts, select font, Windows Forms programming
1 Comment
Make a dialog with standard dialog features in C#
Making a dialog is easy. Just add a new form to the project. Making a dialog that provides standard features (so it acts more or less like a standard dialog) only takes a little more work. To do it right, … Continue reading
Posted in controls, dialogs, forms
Tagged C#, C# programming, ColorDialog, controls, custom dialogs, dialogs, example, example program, FontDialog, forms, OpenFileDialog, SaveFileDialog, standard dialogs, Windows Forms programming
1 Comment