Your code has many issues. The one you are looking for is that you don’t clear the alist before loading new file names. So insert: alist.Clear(); before //Get Each files And also filelength = alist.Count; after the loop. No need to count while adding! Also note that ArrayList is pretty much depracated and you should … Read more
First of all you have to create an instance of Form2. namespace WindowsFormsApplication1 { public partial class Form1 : Form { private Form2 form2; public Form1() { InitializeComponent(); form2 = new Form2(); } private void button1_Click(object sender, EventArgs e) { String value1 = File.ReadAllText(textBox1.Text); foreach (string line in value1.Split(‘\n’)) { form2.listBox1.Items.Add(line); } } } } … Read more
The ForeColor of the GroupBox is not related to the Form ForeColor. Many controls do but GroupBoxes do not take the Form ForeColor. You should change GroupBox ForeColor if you want it to be yellow. 4 solved Setting color of the text property of GroupBox
The simplest way is for you to create an ordered collection of objects (a List<> for example) which you would redraw each time that the OnPaint event is called. Something like: // Your painting class. Only contains X and Y but could easily be expanded // to contain color and size info as well as … Read more
In this case, write invoke operation inside of method. Then you can access both from control’s thread and other threads. delegate IntPtr GetWindowHandleDelegate(); private IntPtr GetWindowHandle() { if (this.InvokeRequired) { return (IntPtr)this.Invoke((GetWindowHandleDelegate)delegate() { return GetWindowHandle(); }); } return this.Handle; } or, if you want to avoid delegate hell, you could write in more few code … Read more
Is this what you are looking for? FileStream currentFileStream = null;//EDIT string tempFilePath = Directory.GetCurrentDirectory() + “\\TEMP.txt”; if (!File.Exists(tempFilePath)) { currentFileStream = File.Create(tempFilePath);//creates temp text file currentFileStream.Close();//frees the file for editing/reading }//if file does not already exist File.WriteAllText(tempFilePath, textbox1.Text);//overwrites all text in temp file //Inside your exit function: if(File.Exists(tempFilePath)) File.Delete(tempFilePath);//delete temp file 2 solved Write … Read more
You can use the Tag property of each control. So set it to something meaningful and on Click event do something like this: (sender As Control).Tag EDIT: Also you may do this: foreach (Control item in this.Controls) //this IS YOUR CURRENT FORM { if ((sender as Control).Equals(item)) { //Do what you want } } 1 … Read more
Have you tried SupressKeyPress? if (e.KeyCode < Keys.D1 || e.KeyCode > Keys.D6 || e.Shift || e.Alt) { e.SuppressKeyPress = true; } if (e.KeyCode == Keys.Back) { e.SuppressKeyPress = false; } The 2nd If makes you able to press backspace if you want to change what you wrote. solved WinForms Textbox only allow numbers between 1 … Read more
Here’s a simple example using the Reflection approach: private void button1_Click(object sender, EventArgs e) { Form f2 = TryGetFormByName(“Form2”); if (f2 != null) { f2.Show(); } } public Form TryGetFormByName(string formName) { var formType = System.Reflection.Assembly.GetExecutingAssembly().GetTypes() .Where(T => (T.BaseType == typeof(Form)) && (T.Name == formName)) .FirstOrDefault(); return formType == null ? null : (Form)Activator.CreateInstance(formType); } … Read more
The DragOver event will be fired when the mouse moves over the tabcontrol while the drag action is still in effect. You can use similar logic to the mousemove logic in Change SelectedTab of TabControl on MouseOver in your DragOver handler to make the tabs switch. Edit: I did a little MSDN research and found … Read more
You can try the following string[] strarr = new string[] { @”c:\temp\newimages\Changed_Resolution_By_10\SecondProcess_-Width = 502 Height = 502\animated502x502.gif”, @”c:\temp\newimages\Changed_Resolution_By_10\SecondProcess_-Width = 492 Height = 492\animated492x492.gif”, @”c:\temp\newimages\Changed_Resolution_By_10\SecondProcess_-Width = 2 Height = 2\animated2x2.gif” }; IEnumerable<string> strTest = strarr.OrderByDescending(p => p.Substring(p.IndexOf(“x”), p.Length – p.IndexOf(“.”))); solved How can i sort array: string[]?
If Path actually contains double slashes (which usually doesn’t happen): Replace \\ with \ in path1 Replace path1 with Empty String in path2 string diff = path2.Replace(path1.Replace(@”\\”, @”\”), “”); Otherwise: string diff = path2.Replace(path1, “”); 9 solved Get Difference of 2 Paths [duplicate]
You have several issues here: First of all, your string cu is declared inside the if scope. It will not exist outside that scope. If you need to use it outside the scope of the if, declare it outside. Second, math operations cannot be applied to strings. Why are you casting your numeric values to … Read more
Here is a pattern to follow, place your data operations in a separate class and call in your form. Here Login class could be whatever you want to call it with required properties. public class Login { public int Id { get; set; } . . . } Mocked data class, here since select * … Read more
Don’t worry about the performance of polling. With a suitable INDEX, MySQL can handle 100 polls/second — regardless of dataset size. Let’s see SHOW CREATE TABLE and the tentative SELECT to perform the “poll”; I may have further tips. Also, let’s see the admin’s query that needs to ‘trigger’ the workers into action. Surely the … Read more