datagridview

问题 I have a DataGridView with a KeyDown event. void dataGridView1_KeyDown(object sender, KeyEventArgs e) { if (e.KeyCode == Keys.C && e.Modifiers == (Keys.Control | Keys.Shift)) { MessageBox.Show("ok"); // to test if working } } The message box prompts when I press the key combinations. But that is only when the datagridview is empty (no rows of data). The code doesn't work when the datagridview has rows already. Is there any wrong with the codes? 回答1: The KeyDown event handler doesn't fire when

问题 In my datagridview , four columns 1 & 2 are read only col 3 & 4 got number values. I want to compare that 4th column must be greater that 3rd column. For example: If the 4th column value is less than the 3rd column then I want to propose message doesn't navigate to another control. My simple approach seems not working. How can I compare 2 specific columns for this kind of condition? private void datagridview_CellValidating(object sender, CellValidatingEventArgs e) { try { int bbor =

问题 In my datagridview , four columns 1 & 2 are read only col 3 & 4 got number values. I want to compare that 4th column must be greater that 3rd column. For example: If the 4th column value is less than the 3rd column then I want to propose message doesn't navigate to another control. My simple approach seems not working. How can I compare 2 specific columns for this kind of condition? private void datagridview_CellValidating(object sender, CellValidatingEventArgs e) { try { int bbor =

问题 I have a datagridview and once I populate the view with the data source I hide the columns that I do not need. For some reason the 1st column is not hiding. I have checked the column name and they match and the 2nd line executes fine hides the column for the EVENTID. I even did a messagebox.show( dgvTourOther.Columns("OTHERID").name) and it returned the correct name. dgvTourOther.Columns("OTHERID").Visible = False dgvTourOther.Columns("EVENTID").Visible = False Any idea what could cause a

问题 I have set the readonly property of 2 datatable columns to true. List.Columns[0].ReadOnly = true; List.Columns[1].ReadOnly = true; But i only want them to be read only when user is trying to update, User can add new rows to dataGridView so i want to turn the readonly property to false when trying to add new row. i tried doing this on CellDoubleClick event of the datagrid but it wont do anything as it is to late for the beginedit to be called. if(e.RowIndex == GridView.Rows.Count-1) GridView

问题 I have a custom IBinding List which raises the ListChanged event. I would like to recolor the Datagridview row after the ListChanged event. The Datagridview is responding to ListChanged event and changes the cell value but the CellValueChanged event is never fired. What Datagridview event reflects the ListChanged event? Class CustomList : IBinding Public Sub UpdateList(Byval index as Integer) List(index).Active = true RaiseEvent ListChanged(Me, _ New System.ComponentModel.ListChangedEventArgs

问题 I know that similar to this question was asked before, but mine is a little bit more different. I tried most of the previously suggested solutions, but none of them work. So the problem is that I've got two classes as shown: public class Dog { public String Name { get; set; } public int Age{ get; set; } } public class Person { public String First_Name { get; set; } public String Last_Name { get; set; } public Dog dog { get;set;} } Also, I have a list of People List < Person > that I am

问题 Im Trying to add a Image column From My Project's Resources to a newly created DataGridView This Is the Code: DataGridViewImageColumn myImage = new DataGridViewImageColumn(); myImage.Image = Properties.Resources.bullet_arrow_down; myImage.ImageLayout = DataGridViewImageCellLayout.Zoom; myImage.Name = "Remove"; DirectoryGrid.Columns.Add(myImage); But When i run the code i get the default "X" Image and not my selected image. Is the Image Over Sized?(it's a 32x32 ico) Must i add some bit

问题 Im creating a calendar appointment application, Id like to change the color of the datagridview of the non empty cell (those with value) upon loading/opening the application. my application already handles how to load the data. i'm able to change the color of the non empty cell but after closing and opening again the color is back to default. Im not sure with the correct syntax , or if i need to go through all the cells like do a loop for the entire table and change the cell back color. VB

问题 I have a DataGridView control in my Windows Forms Application. I am adding rows to the grid using a background thread. I change the form's cursor to Waitcursor when the process starts and back to Default when it ends. This works well for the form, but not for the grid. When the form's cursor is changed back to default, the grid's cursor does not change, although the cursor over the rest of the form does. Does this have anything to do with the fact that I am updating the grid from a background