winforms

问题 How do I detect if a device is touch-enabled in c# for a WinForms app (Not WPF). I found information on GetSystemMetrics...can't find how to use this in c#. I Tried using System.Windows.Input.Tablet class..not coming up in c#, even though I am using .Net Framework 4.5. I Tried using System.Windows.Devices...not coming up in c#, even though I am using .Net Framework 4.5. I have also checked This and This, which would seem to make this question a duplicate. However, neither of these answers my

问题 Is there some sort of boolean that I can use to check whether the instance of a form is loaded, or otherwise wait until the form is loaded? for example: While(form_loaded == false) { Try { //do something } catch { }//do try catch so code won't barf } I keep getting the following exception: A first chance exception of type 'System.InvalidOperationException' occurred in System.Windows.Forms.dll An unhandled exception of type 'System.InvalidOperationException' occurred in System.Windows.Forms

问题 I have a RichTextBox with thousands of lines of text in it. I can easily SET the first visible line by using ScrollToCaret() by doing... this.SelectionStart = this.Find(this.Lines[lineIndex], RichTextBoxFinds.NoHighlight); this.ScrollToCaret(); But I would like to be able to GET the first visible line too. Any suggestions? 回答1: Here may be what you need: //get the first visible char index int firstVisibleChar = richTextBox1.GetCharIndexFromPosition(new Point(0,0)); //get the line index from

问题 Does anyone have any idea on how to create a trackbar with multiple sliders in WinForms? I would like to mark a range. Also, is it possible to offset the sliders vertically a little bit? My goal would be to have two sliders above the trackbar, and two below it. v-----------------v ________________________________________ ^------^ 回答1: You can do this by writing your own UserControl where you handle the mouse events and painting yourself. You would need several hit test regions; one for each

问题 Does anyone have any idea on how to create a trackbar with multiple sliders in WinForms? I would like to mark a range. Also, is it possible to offset the sliders vertically a little bit? My goal would be to have two sliders above the trackbar, and two below it. v-----------------v ________________________________________ ^------^ 回答1: You can do this by writing your own UserControl where you handle the mouse events and painting yourself. You would need several hit test regions; one for each

问题 I need help with my tool. I have try change Color my Panel with ColorDialog but, it does not work I want change colors all Panel in my Form . Panel constuctor: Panel p = new Panel(); Event handlers: private void button104_Click_1(object sender, EventArgs e) { this.bg.FullOpen = true; if (this.bg.ShowDialog() == DialogResult.OK) { this.setBgColor(this.bg.Color); } } public void setBgColor(Color rgb) { p.BackColor = rgb; } 回答1: You can select all controls of a particular type by using the

问题 So I'm attempting to get the userinputs when someone presses hotkeys, also outside the form (in this case SHIFT+A). Now since I wanted to add tabs to my forms application I decided to go with usercontrols, now the problem is, that I am unable to access the formclosing event (from form1) on the usercontrol, meaning I would have to somehow parse whatever I wanted to execute in the formclosing event. Usercontrol (named home) public partial class Home : UserControl { [System.Runtime

问题 So I'm attempting to get the userinputs when someone presses hotkeys, also outside the form (in this case SHIFT+A). Now since I wanted to add tabs to my forms application I decided to go with usercontrols, now the problem is, that I am unable to access the formclosing event (from form1) on the usercontrol, meaning I would have to somehow parse whatever I wanted to execute in the formclosing event. Usercontrol (named home) public partial class Home : UserControl { [System.Runtime

问题 My goal is to use Form as progress bar of the Visio Application during some long actions. Which means, the Form should be display on top of the Visio Application. I also need the Form as non modal dialog (means not Form.ShowDialog() ) in order to letting the Visio app to continue works while the Form is appeares. I've already tried the following steps: Create a wrapper class that implements the IWin32Window. public class WindowWrapper : System.Windows.Forms.IWin32Window { public WindowWrapper

问题 My goal is to use Form as progress bar of the Visio Application during some long actions. Which means, the Form should be display on top of the Visio Application. I also need the Form as non modal dialog (means not Form.ShowDialog() ) in order to letting the Visio app to continue works while the Form is appeares. I've already tried the following steps: Create a wrapper class that implements the IWin32Window. public class WindowWrapper : System.Windows.Forms.IWin32Window { public WindowWrapper