winforms

问题 I use AllocConsole() to open a Console in a winform application. How can I prevent the application from exiting when the Console is closed? EDIT The update of completionpercentage from time to time is what I want to show in console void bkpDBFull_PercentComplete(object sender, PercentCompleteEventArgs e) { AllocConsole(); Console.Clear(); Console.WriteLine("Percent completed: {0}%.", e.Percent); } I tried the richtextBox as the alternative s =(e.Percent.ToString()); richTextBox1.Clear();

问题 I am using Winforms DevExpress and I am binding a DataTable to a DataGridView which is working fine. The problem I am having is that I have some functions that will build a new DataTable object which is separate from the original which needs to replace the original DataTable that is bound to the DataGridView. DataTable originalTable = new DataTable("OriginalTable"); //Populate originalTable myDataGridControl.DataSource = originalTable; Everything works fine with the code above, but the

问题 I know that it easy to just drag and drop a button, however a lecturer insists on creating buttons programmatically. In the Form1_Load method what code should I write to create a simple button? private void Form1_Load(object sender, System.EventArgs e) { } So that on Load the button would show? 回答1: As you said it is Winforms, you can do the following... First create a new Button object. Button newButton = new Button(); Then add it to the form inside that function using: this.Controls.Add

问题 I have a DataGridView and handle event CellFormatting. It has a parameter called: DataGridViewCellFormattingEventArgs e With e.RowIndex in it. When i do: DataGridView.Rows[e.RowIndex] I get proper row from collection. But when I click at a header of a column to sort it by other column than default one and user DataGridView.Rows[e.RowIndex] I get unproper row. It is because Rows collection do not reflect order of rows in DataGridView. So how to get propert DataGridViewRow from RowIndex in

问题 I use an ArrayList for my binary search. The datagridview's rows is added to the ArryList. When I deleting a single row from the datagridview, it works almost perfectly. The problem is when I delete many rows from the datagridview from the top or the bottom and middle, it gives me an error. How can I refresh or update the ArrayList after I deleted a row from the ArrayList (datagridview)? The error: 'Index was out of range. Must be non-negative and less than the size of the collection.

问题 I'm using WinForms and have a DragDrop operation that handles a file being dragged onto the window. This works fine but if the path to the file is very long it just fails. string[] fileList = (string[]) e.Data.GetData(DataFormats.FileDrop, false); results in fileList being null . Does anyone know what the limitation is or any way to work around it? Thanks! Update: The data in GetFormats is as follows: Short Filename: Shell IDList Array UsingDefaultDragImage DragImageBits DragContext

问题 I'm using WinForms and have a DragDrop operation that handles a file being dragged onto the window. This works fine but if the path to the file is very long it just fails. string[] fileList = (string[]) e.Data.GetData(DataFormats.FileDrop, false); results in fileList being null . Does anyone know what the limitation is or any way to work around it? Thanks! Update: The data in GetFormats is as follows: Short Filename: Shell IDList Array UsingDefaultDragImage DragImageBits DragContext

问题 I'm using WinForms and have a DragDrop operation that handles a file being dragged onto the window. This works fine but if the path to the file is very long it just fails. string[] fileList = (string[]) e.Data.GetData(DataFormats.FileDrop, false); results in fileList being null . Does anyone know what the limitation is or any way to work around it? Thanks! Update: The data in GetFormats is as follows: Short Filename: Shell IDList Array UsingDefaultDragImage DragImageBits DragContext

问题 This question already has answers here : Cannot remove spacing between controls in TableLayoutPanel? (3 answers) Closed 2 years ago . I have 4x4 table. How to make that the first row will have 2 cells only? Tried with ColumnSpan but it's still drawing borders between cells. Example: ---------------------- | A | B | ---------------------- | 1 | 2 | 3 | 4| ---------------------- 回答1: You can Dock a Panel with Margin=0 in a cell and then span that Panel to the desired size and use it as the

问题 I am working on a winforms project and I am having issues with DataGridView as I have never used it before. Issue 1: I have want the program to auto generate "MemberID" and it should not be editable by the user. Issue 2: I am working with database and I do not want "FamilyDetailFK" to be displayed, instead it should automatically be the value displayed by a TextBox in another part of the GUI. Issue 3: Is there any way the user can select "Relationship" from a drop down menu, so that means