We can change this behavior by setting the DecimalPlaces property, which specifies the number of decimal places. We'll set this value to 2 for both controls we put in our form. We also set their Minimum and Maximum properties. In our case, the minimum should be some low value and the maximum some high value, let's say and To use the maximum values of a given data type, we'd have to set the limits in the form code using the MaxValue and MinValue properties of the respective data type.
The advantage of entering numbers using this control is that the user isn't able to enter any nonsense value. If we parsed the number from a TextBox which we'll show you in the next lessons , our application might crash when it gets an invalid value.
It's always easier to choose the right control than to check the user's input. Note that the name should always contain the control type. Moreover, it makes easier to orientate in the code. Sometimes names as numberNmr , calculateBtn , etc. We're almost there. ComboBox is a drop-down list with several predefined items. The items can be either added in the designer or specified in the code, even while the program is running.
This applies to all controls - all their properties from the designer can also be set in the code. However, some advanced properties can only be set from the code and aren't present in the designer. We'll name the control operationComboBox and then click the " Inside the newly opened window, we'll list the options that can be selected in the comboBox. We write each option on a separated line. The items don't have to be strings, we can pass objects as well. We'll show this later.
We'll move to the source code of the form. Inside the form constructor, below the InitializeComponents method call, we'll set the selected item of the operationComboBox. To do this, we'll set the SelectedIndex property to 0 , thus the first item:. Into the constructor, we write the code that should be executed right after the form is created. When you run the app, adding will be selected as the operation:.
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Create a New Windows Form Applicatio In Previous Post, we All of us have seen a comment box on various websites. In software applications, sometime user needs to export or Import the data in Excel format in order to perform several operations. In this After you select your C project template and name your file, Visual Studio opens a form for you.
A form is a Windows user interface. We'll create a "Hello World" application by adding controls to the form, and then we'll run the app. If you don't see the Toolbox fly-out option, you can open it from the menu bar. In the Properties window, locate Text , change the name from button1 to Click this , and then press Enter.
If you don't see the Properties window, you can open it from the menu bar. Or, press F4. In the Design section of the Properties window, change the name from button1 to btnClickThis , and then press Enter.
If you've alphabetized the list in the Properties window, button1 appears in the DataBindings section, instead. Now that we've added a button control to create an action, let's add a label control to send text to.
Select the Label control from the Toolbox window, and then drag it onto the form and drop it beneath the Click this button. In either the Design section or the DataBindings section of the Properties window, change the name of label1 to lblHelloWorld , and then press Enter. In the Form1. Alternatively, you can expand Form1. Several things will happen. But outside of the IDE, a Form1 dialog box appears. It will include your Click this button and text that says label1.
Select the Click this button in the Form1 dialog box. Notice that the label1 text changes to Hello World! In the Properties window, locate Text , change the name from Button1 to Click this , and then press Enter. If you've alphabetized the list in the Properties window, Button1 appears in the DataBindings section, instead. This solution will contain the below 2 project files. On the left-hand side of Visual Studio, you will also see a ToolBox.
The toolbox contains all the controls which can be added to a Windows Forms. Controls like a text box or a label are just some of the controls which can be added to a Windows Forms.
To go to the properties of a control, you need to right-click the control and choose the Properties menu option. If you follow all of the above steps and run your program in Visual Studio, you will get the following output. In the output, you can see that the Windows Form is displayed. In our Windows form application in C examples, we will create one form which will have the following functionality.
A group box is used for logical grouping controls into a section. Ideally, these are details of a person, so you would want to have these details in a separate section on the Form. For this purpose, you can have a group box. Step 1 The first step is to drag the Groupbox control onto the Windows Form from the toolbox as shown below. Step 2 Once the groupbox has been added, go to the properties window by clicking on the groupbox control.
In the output, you can clearly see that the Groupbox was added to the form. Next comes the Label Control. The label control is used to display a text or a message to the user on the form.
The label control is normally used along with other controls. Common examples are wherein a label is added along with the textbox control. The label indicates to the user on what is expected to fill up in the textbox. Step 1 The first step is to drag the label control on to the Windows Form from the toolbox as shown below.
Step 2 Once the label has been added, go to the properties window by clicking on the label control. In the properties window, go to the Text property of each label control. A textbox is used for allowing a user to enter some text on the Windows application in C. We will add 2 textboxes to the form, one for the Name and the other for the address to be entered for the user. Step 1 The first step is to drag the textbox control onto the Windows Form from the toolbox as shown below.
Step 2 Once the text boxes have been added, go to the properties window by clicking on the textbox control.
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