datagridviewcolumn

问题 I've create an application which displays a DataGridView with a series of questions. The dgv structure consists of one string column for the question text and three bool/checkbox columns for the answers (yes, no, N/A). Each single question is displayed on its own row. I would like my program to only allow the user to select only Yes, only No or only N/A on each row. I think I would need to uncheck the other checkbox options when one option is checked but I'm not too sure on how to do this. I

问题 I want to merge 3 Datagridview columns headers (the 3rd, 4th, and the 5th columns) and the RightToleft property of the Datagridview is enabled. i user this code: private void PromotionButton_Click(object sender, EventArgs e) { dataGridView1.ColumnHeadersHeight = dataGridView1.ColumnHeadersHeight * 2; dataGridView1.ColumnHeadersDefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleCenter; dataGridView1.CellPainting += new DataGridViewCellPaintingEventHandler(dataGridView1

问题 I have the following DataGridViewCheckBoxCell . the problem is the visual update doesn't take place immediately in the edit mode, only when i quit it public class CustomDataGridViewCell : DataGridViewCheckBoxCell { protected override void Paint(Graphics graphics, Rectangle clipBounds, Rectangle cellBounds, int rowIndex, DataGridViewElementStates elementState, object value, object formattedValue, string errorText, DataGridViewCellStyle cellStyle, DataGridViewAdvancedBorderStyle

问题 Popular way (1, 2) for custom painting of items in DataGridViewComboBox is handling of event DataGridView1. EditingControlShowing and setting up DrawItem event handlers there: private void dataGridView1_EditingControlShowing( object sender, DataGridViewEditingControlShowingEventArgs e) { theBoxCell = (ComboBox) e.Control; theBoxCell.DrawItem += theBoxCell_DrawItem; theBoxCell.DrawMode = DrawMode.OwnerDrawVariable; } You see what is wrong: it uses control-level event to handle work for columns

问题 I have created a custom DataGridViewColumn for my project in WinForms. The control renders perfectly, but once I input the value and move to another cell, the value disappears and comes up as null when I check in CellEndEdit. Following is the code: class NumericEditControl : NumericTextBox, IDataGridViewEditingControl { DataGridView dataGridView; private bool valueChanged = false; int rowIndex; public NumericEditControl() { this.Value = 0; } public void ApplyCellStyleToEditingControl

问题 I have created a custom DataGridViewColumn for my project in WinForms. The control renders perfectly, but once I input the value and move to another cell, the value disappears and comes up as null when I check in CellEndEdit. Following is the code: class NumericEditControl : NumericTextBox, IDataGridViewEditingControl { DataGridView dataGridView; private bool valueChanged = false; int rowIndex; public NumericEditControl() { this.Value = 0; } public void ApplyCellStyleToEditingControl

问题 I have a DataGridViewLinkColumn.How can I make the header(row = -1) as underline and change it's background color var WarningsColumn = new DataGridViewLinkColumn { Name = @"Warnings", HeaderText = @"Warnings", DataPropertyName = @"WarningsCount", AutoSizeMode = DataGridViewAutoSizeColumnMode.DisplayedCells, ReadOnly = true }; 回答1: I think you have to add custom code to a CellPainting event handler like this: Point spot; private void dataGridView_CellPainting(object sender,

问题 I have a Datagrid that is being built dynamically from incoming data using the following: TableData = JObject.Parse(File.ReadAllText(@"Datainfo.json")); var listCols = new List<DataColumn>(); var rawData = new DataTable(); foreach (dynamic item in TableData.data) { string columnName = item.Column; var column = new DataColumn(columnName); string DataType = item.DataType; if (DataType == "Int" ) { column.DataType = Type.GetType("System.Int32"); } else { column.DataType = Type.GetType("System

问题 I have DataGridView it's contains 4 columns, one of the column is DataGridViewComboBoxColumn. In DataGridView I want to prevent user to delete, edit, add rows in data grid view, so I set the ReadOnly property of the DdataGgridView to true. My problem is that DataGridViewComboBoxColumn is not selectable because ReadOnly property is set true. Any idea how can I prevent user to delete, edit, add rows in DataGridView control, but make DataGridViewComboBoxColumn selectable? 回答1: Please read the

问题 I have a combobox which is connected to the database so I populate the value of my combobox based on what's in my database. my combobox is another FORM from the datagrid. So here's I want to achieve. form1 = datagrid (based on the database) form2 = combobox (based on the database) I want that If I highlight a certain row (My selection mode = fullrowselect) and press a button the comboBox will automatically point to that row. for ex. datagrid name: Joe (highlighted) *user clicks the button