datagridviewcombobox

问题 There are a few posts about this, but after hours of searching I still can't find what I need. The answer in the following post almost gets me what I want: Combobox for Foreign Key in DataGridView Question 1: Going off that example where a Product has many Licenses, my database mappings are all many-to-one relationships which means my License class holds a reference to the Product class. The License class does not have a property for the ProductId since that can be retrieved via the Product

问题 I am using the ( EditingControlShowing ) event to Enable AutoComplete in DataGridViewComboBox Column. private void dataGridView1_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e) { if (e.Control is DataGridViewComboBoxEditingControl) { ComboBox combo = (ComboBox)e.Control; ((ComboBox)e.Control).DropDownStyle = ComboBoxStyle.DropDown; ((ComboBox)e.Control).AutoCompleteSource = AutoCompleteSource.ListItems; ((ComboBox)e.Control).AutoCompleteMode = System.Windows

问题 I have a DataGridView that has a ComboBox column and I must update each ComboBox's possible values when its drop down shows. I also must make the ComboBox es capable of having custom typed values. When a new value is typed, it should be added to the list of possible values. The problem is that I get infinitely many DataError event triggers (error message boxes), I know how to handle it by just changing a field in the DataGridViewDataErrorEventArgs object, but I know it is not the correct way

问题 I am trying to create a DataGridView that holds configuration information. The available values can change for each row within a column based on the values in a different column so I can't attach a single datasource to the comboBox column. As an example: If you select car, the availalbe colors should be limited to colors available for that model. Car ColorsAvailable Camry {white,black} CRV {white,black} Pilot {silver,sage} The reason for considering the dataGridView is so that the operator

问题 I have tables like that in Datagridview: Name Money ------------- Hi 100 //here Combobox with member {10,30,80,100} to choose Ki 30 //here Combobox with member {10,30,80,100} to choose I want to change Column "Money" Value from combobox I tried with this but dont know further: DataTable dt = new DataTable(); dt.Columns.Add("Name", typeof(String)); dt.Columns.Add("Money", typeof(String)); dt.Rows.Add(new object[] { "Hi", 100}); dt.Rows.Add(new object[] { "Ki", 30}); DataGridViewComboBoxColumn

问题 I'm trying to bind separate ComboBox cells within a DataGridView to a custom class, and keep getting an error DataGridViewComboBoxCell value is not valid I'm currently assigning the data source for the cell to an IList<ICustomInterface> from a Dictionary I've got. Upon setting the data source however, the index for the ComboBoxCell isn't set, so it has an invalid value selected. I'm trying to figure out how to get it to select a real value, e.g. the 0th item within the list it has been given

问题 I have added a DataGridViewComboBox to a bound DataGridView ( grdBOOK ), the DataGridViewComboBox will replace column 3 to allow for user selection. I'm struggling to set the default of the DataGridViewComboBox equal to the value of column 3 so user selection is not required if the value is correct. I pulled the code below from the net, but I get an error: DataGridViewComboBoxCell value is not valid. I thought a ComboBox cell could be treated as a normal DataGridView cell, but (see code below

问题 I need some help with the DataGridView class in Windows Forms, I don't know if it's just me but I am really struggling with this class programmatically. You would think that a simple task as adding a Column as a ComboBox to a DataGridView would be a piece of cake, but apparently it's not! The reason I need to do it programmatically is because I need multiple ComboBoxes on each Row in the DataGridView where the selectable drop down items will be dependent on selections in one or more of the

问题 I have a GUI which allows the user to select a report to view/edit. When the user selects a report, it shows the Items in the report. The Item has many properties - most of which are binding properly. One of the properties is Owner, and this is bound to a ComboBoxColumn. Report Items Owner I have done something very similar to this a few times and had no problems when I set the DataPropertyName , DataSource , ValueMember , and DisplayMember . The only difference is that this time instead of

问题 I am having weird results in my DataGridViewComboBoxColumn. 1) When there is no value set, and I click on the cell (not the drop down arrow) the first value in the options shows as the value, and when I click off the cell, it returns back to blank value. This is misleading as there was no value chosen, yet it shows the first value until you click off the cell. One solution was to make the first option blank, however then I am still afflicted by the next issue... 2) If I select a cell that