Category Archives: Winform Controls

12 Jul

Save A File With SaveFileDialog Using C#

This example shows how to save a file using the SaveFileDialog dialog box. SaveFileDialog allows users to set a file name for a specific file. It is found in System.Windows.Forms namespace and it displays the standard Windows dialog box.

Usage:

            SaveFileDialog saveDialog = new SaveFileDialog();
            saveDialog.Title = "Save";
            saveDialog.Filter = "Text Files (*.txt)|*.txt" + "|" +
                                "Image Files (*.png;*.jpg)|*.png;*.jpg" + "|" +
                                "All Files (*.*)|*.*";
            if (saveDialog.ShowDialog() == DialogResult.OK)
            {
                string file = saveDialog.FileName;
            }
12 Jul

Select A File With OpenFileDialog Using C#

This example shows how to select a file using the OpenFileDialog dialog box. OpenFileDialog allows users to select files. It is found in System.Windows.Forms namespace and it displays the standard Windows dialog box.

Usage:

            OpenFileDialog openDialog = new OpenFileDialog();
            openDialog.Title = "Select A File";
            openDialog.Filter = "Text Files (*.txt)|*.txt" + "|" + 
                                "Image Files (*.png;*.jpg)|*.png;*.jpg" + "|" +
                                "All Files (*.*)|*.*";
            if (openDialog.ShowDialog() == DialogResult.OK)
            {
                string file = openDialog.FileName;
            }
27 Jun

C# Chart Control Example

This example shows how to display your data in your Windows Forms program as a bar graph or spline chart. To achieve this, you use Chart class in System.Windows.Forms.DataVisualization.Charting. Chart control can be found in Toolbox(.NET Framework 4.0 or newer). Older versions will not have the Chart control available.
To add a chart control to your application,

  • In design view, open the Toolbox.
  • From the Data category, drag a Chart control to the design area.

If you cannot see the Chart control in the Toolbox, right click in the Toolbox, select Choose Items, and then select the following namespaces in the .NET Framekwork Components tab:

  • System.Web.UI.DataVisualization.Charting
  • System.Windows.Forms.DataVisualization.Charting

C# Winform Choose Toolbox Items

Usage:

        void FrmChartExample_Load(object sender, EventArgs e)
        {
            BarExample(); //Show bar chart
            //SplineChartExample();
        }


This method shows how to add a bar chart.

        public void BarExample()
        {
            this.chartControl.Series.Clear();

            // Data arrays
            string[] seriesArray = { "Cat", "Dog", "Bird", "Monkey" };
            int[] pointsArray = { 2, 1, 7, 5 };

            // Set palette
            this.chartControl.Palette = ChartColorPalette.EarthTones;

            // Set title
            this.chartControl.Titles.Add("Animals");

            // Add series.
            for (int i = 0; i < seriesArray.Length; i++)
            {
                Series series = this.chartControl.Series.Add(seriesArray[i]);
                series.Points.Add(pointsArray[i]);
            }
        }

C# Bar Chart Example

This method shows how to add a spline chart.

        private void SplineChartExample()
        {
            this.chartControl.Series.Clear();

            this.chartControl.Titles.Add("Total Income");

            Series series = this.chartControl.Series.Add("Total Income");
            series.ChartType = SeriesChartType.Spline;
            series.Points.AddXY("September", 100);
            series.Points.AddXY("Obtober", 300);
            series.Points.AddXY("November", 800);
            series.Points.AddXY("December", 200);
            series.Points.AddXY("January", 600);
            series.Points.AddXY("February", 400);
        }

C# Spline Chart Example

25 Jun

C# Update A GUI Element From Another Thread

This examples shows how to update a user interface element from another thread. To do this, we must update to the user interface in user interface thread. Invoke method in Control class implements this task.

Sample Usage:

            //Usage 1
            txtSampleTextBox.Invoke(new Action(() => txtSampleTextBox.Text = "Sample Text"));

            //Usage 2
            txtSampleTextBox.Invoke((MethodInvoker)(() => txtSampleTextBox.Text = "Sample Text"));
23 Jun

C# Disable Or Hide Close Button(X) in Windows Form

This examples show how to hide/disable close button(X) in C#. To achieve this, we must override the CreateParams method in Form class.

Disable Close Button:

            
        //Disable close button
        private const int CP_DISABLE_CLOSE_BUTTON = 0x200;
        protected override CreateParams CreateParams
        {
            get
            {
                CreateParams cp = base.CreateParams;
                cp.ClassStyle = cp.ClassStyle | CP_DISABLE_CLOSE_BUTTON;
                return cp;
            }
        }

Disable Close Button

Remove The Entire System Menu:

        //remove the entire system menu:
        private const int WS_SYSMENU = 0x80000;
        protected override CreateParams CreateParams
        {
            get
            {
                CreateParams cp = base.CreateParams;
                cp.Style &= ~WS_SYSMENU;
                return cp;
            }
        }

Remove Entire System Menu