datagridview

问题 I need to only allow one character to be entered into the editable datagridview cells (every other column, the odd-numbered ones, are editable); if the user adds a second character while in one of these cells, the cursor should move to the next cell down and put that second value there (pressing again on that key moves down again, and so forth). If at the bottom of the grid (the 12th row), it should move to row 0 and also move two columns to the right. I tried doing this: private void

问题 When handing the DataGridView.Scroll event, you can check whether it was the end of the scroll (when dragging the scroll bar with the mouse, this is presumably when the mouse button is released). The problem is that this never seems to happen. e.Type is never ScrollEventType.EndScroll What's wrong with this? How can I do something only when scrolling finishes? private void dataGridView_Scroll(object sender, ScrollEventArgs e) { if (e.Type == ScrollEventType.EndScroll) { // ... } } 回答1: Well,

问题 When handing the DataGridView.Scroll event, you can check whether it was the end of the scroll (when dragging the scroll bar with the mouse, this is presumably when the mouse button is released). The problem is that this never seems to happen. e.Type is never ScrollEventType.EndScroll What's wrong with this? How can I do something only when scrolling finishes? private void dataGridView_Scroll(object sender, ScrollEventArgs e) { if (e.Type == ScrollEventType.EndScroll) { // ... } } 回答1: Well,

问题 When handing the DataGridView.Scroll event, you can check whether it was the end of the scroll (when dragging the scroll bar with the mouse, this is presumably when the mouse button is released). The problem is that this never seems to happen. e.Type is never ScrollEventType.EndScroll What's wrong with this? How can I do something only when scrolling finishes? private void dataGridView_Scroll(object sender, ScrollEventArgs e) { if (e.Type == ScrollEventType.EndScroll) { // ... } } 回答1: Well,

问题 I am creating a program that generates a bar code and then prints the shipping labels. I have a function that allows the user to upload a spreadsheet into the datagrid view. One of the column names is "Tracking Number". I would like to be able to loop through each cell that has a tracking number and then generate a barcode into a a new cell in a column called "barcode". I understand there is a loop function for this but I have never used it before. The code that generates the barcode is the

问题 What is the fastest way to export DataGridView rows in the range of 460328 - 800328 to Excel or into an SQL Server database table with out using Microsoft office interop as interop is quite slow and heavy on system resources? 回答1: For exporting to Excel, if you aren't using the XML based 2007 or 2010, Interop is pretty much the only way to go. It's not as bad as it's reputation though. I'll list a few solutions. 1 To Excel First add a Microsoft.Office.Interop.Excel component reference to your

问题 I am working on a name record application and the information is stored in a SQLite database. All columns in the database are TEXT types, except for the date of birth column, which is a DATETIME. The original Access database that I transferred to the SQLite database allowed nulls for the date of birth, so when I copied it over, I set all nulls to DateTime.MinValue. In my application, the date of birth column is formatted like so: DataGridViewTextBoxColumn dateOfBirth = new

问题 If you specify AllowUserToAddRows in a winforms DataGridView the user can add new rows manually in the grid. Now i want to add an image-button in one column which should be shown also in the new-row. But i cannot get it to show the image, only the red-cross image is shown like as if it wasn't found. Here's a screenshot of the grid with the annoying image: The image i want to show is in Properties.Resources.Assign_OneToMany . I have searched everywhere and tried several ways like (in

问题 Would someone kindly assist me with the following? I have two DataGridView objects that each display a DataTable, where the two datatables are related with the following code: DataSet dSet = new DataSet(); DataTable ParentList = ListToDataTable(_listOfAllAlbumObjects); DataTable ChildList = ListToDataTable(_listOfAllTrackObjects); dSet.Tables.AddRange(new DataTable[]{ParentList, ChildList}); DataColumn parentRelationColumn = ParentList.Columns["AlbumId"]; DataColumn childRelationColumn =

问题 Would someone kindly assist me with the following? I have two DataGridView objects that each display a DataTable, where the two datatables are related with the following code: DataSet dSet = new DataSet(); DataTable ParentList = ListToDataTable(_listOfAllAlbumObjects); DataTable ChildList = ListToDataTable(_listOfAllTrackObjects); dSet.Tables.AddRange(new DataTable[]{ParentList, ChildList}); DataColumn parentRelationColumn = ParentList.Columns["AlbumId"]; DataColumn childRelationColumn =