winforms

问题 I have a CheckedListBox, binded to a BindingList: private BindingList<string> list = new BindingList<string>(); public MyForm() { InitializeComponent(); list.Add("A"); list.Add("B"); list.Add("C"); list.Add("D"); checkedListBox.DataSource = collection; } When a certain button is clicked the list is updated: private void Button_Click(object sender, EventArgs e) { list.Insert(0, "Hello!"); } And it works fine, the CheckedListBox is updated. However, when some of the items are checked, clicking

问题 Basically what I'm trying to do is to make a picture box go up, then left, then down, then right, all based on timer ticks. I'm fairly new so I don't really know what's wrong. If you guys could give a simple answer or a better approach, that'd be great. Dim slides As Integer slides += 10 If slides < 20 Then PictureBox1.Left += 10 ElseIf slides > 20 AndAlso slides < 40 Then PictureBox1.Top += 10 ElseIf slides > 40 AndAlso < 60 Then PictureBox1.Left -= 10 ElseIf slides > 60 AndAlso < 80 Then

问题 I have one dictionary Like Dictionary<string, List<string>> first=new Dictionary<string, List<string>>(); I want to bind this dictionary to data table such that data table ColumnName should be key of the dictionary and respective columns should contain their dictionary values. What I tried: Dictionary<string, List<string>> some= new Dictionary<string, List<string>>(); System.Data.DataTable dt = new System.Data.DataTable(); foreach (var entry in some) { if (entry.Value.Count > 0) { dt.Columns

问题 I have one dictionary Like Dictionary<string, List<string>> first=new Dictionary<string, List<string>>(); I want to bind this dictionary to data table such that data table ColumnName should be key of the dictionary and respective columns should contain their dictionary values. What I tried: Dictionary<string, List<string>> some= new Dictionary<string, List<string>>(); System.Data.DataTable dt = new System.Data.DataTable(); foreach (var entry in some) { if (entry.Value.Count > 0) { dt.Columns

问题 I have a pre-configured ListView (with column headers already set up), that I would like to task a list of object, and write - as rows to that listview - specific attributes of the class I have a list of. I'm trying to follow this existing question, while it perfectly handles an item with only one column, I'm not sure how to apply multiple sub items. I have a class that contains a List<Product> which is being handed off to a UserControl that takes that list and adds each product item to a

问题 I have a MDI application. This MDI application has lots of other tools including an editor as well. I would like to open all the ".txt" files with the editor of my MDI application, thereby making my application as the default viewer of all the ".txt" files. Whenever the user edits a ".txt" File the MDI application should launch and a editor window should be populated with the contents of the chosen ".txt" file . Is there a way I can do that please. Thanks 回答1: You need to change this reg key:

问题 I have a MDI application. This MDI application has lots of other tools including an editor as well. I would like to open all the ".txt" files with the editor of my MDI application, thereby making my application as the default viewer of all the ".txt" files. Whenever the user edits a ".txt" File the MDI application should launch and a editor window should be populated with the contents of the chosen ".txt" file . Is there a way I can do that please. Thanks 回答1: You need to change this reg key:

问题 I created a java fx application and am customizing the MSI installer. I added my Software.wxs to the package/windows directory and I am getting the error: Unresolved reference to symbol 'WixUI:WixUI_InstallDir' in section I understand I need to reference C:\Program Files (x86)\WiX Toolset v3.11\bin\WixUIExtension.dll which I have seen documentation for in visual studios & in command line but I am using eclipse with the build.xml ANT deploy. If i do not reference any WixUIExtension's my

问题 I have a button which, on Click event I made some validations upon some TextBox es in my Form . If a TextBox does not pass the validation, then I force the Focus to it (user must enter some characters in that TextBox ). My TextBox class already have some code to go to the next control if user will press Enter key. MyTextBox.cs class public class MyTextBox : TextBox { public MyTextBox(){ KeyUp += MyTextBox_KeyUp; KeyDown += MyTextBox_KeyDown; } private void MyTextBox_KeyDown(object sender,

问题 I want to execute a .exe file which starts my node.js app using windows forms(vb.net) on a button click. I am using Process.Start("C:\Users\PROG21\Desktop\chat\start.exe") The problem is it starts the command window and just within 3-4 seconds it automatically closes.Why is that so? This is happening only with Node.js app ,the other .exe files run smoothly through this code. And also on other button click i want to close the command window terminating the Node.js app.How can i achieve it? Any