datagridcomboboxcolumn

问题 I'm filling a DataGridView with 2 columns, a DataGridViewTextBoxColumn for a name label, and a DataGridViewComboBoxColumn to act as a dropdown for selecting an SQL Column name to map to the name. I'm going for a loop through my names, and creating a row for each of them. Each row should display the name of a field ( String object), and in the other column should be a combo box (values are within a List (Of String) ). I keep getting an exception raised that says 'the value is not valid': For

问题 In my WPF DataGrid , the data is populated from Employee class (shown below). The StateName column in the Employee class is a Combobox inside DataGrid. The Combobox is populated from the State class (shown below). The data is displayed correctly (as shown in image 1 below). But when I select a different state from the combobox (as shown in image 2 below) and move the cursor to the next row of the grid, the newly selected value of the State changes back to the default value. For example, when

问题 In my WPF DataGrid , the data is populated from Employee class (shown below). The StateName column in the Employee class is a Combobox inside DataGrid. The Combobox is populated from the State class (shown below). The data is displayed correctly (as shown in image 1 below). But when I select a different state from the combobox (as shown in image 2 below) and move the cursor to the next row of the grid, the newly selected value of the State changes back to the default value. For example, when

问题 I have the class Devices with Platform as one of the properties: public partial class DevicesCollection : ObservableCollection<Device> { public DevicesCollection() : base() { } } public partial class Device : INotifyPropertyChanged { private string hostIP; private string password; private int platform; private string status = ""; private int loop = 1; public Device() { } public Device(string ip, string pswd, int tp) { HostIP = ip; Password = pswd; Platform = tp; Status = "Disconnected"; Loop

问题 I have ProcurementFrm that list the available items in a DataGridViewComboBoxColumn using this method: /** Populate combo box in datagrid in procurement screen */ public void populateGridComboBox() { con.Open(); MySqlCommand sc = new MySqlCommand("select id, ar_desc from minierp_db.items", con); //MySqlDataReader reader; MySqlDataReader itemReader = null; try { itemReader = sc.ExecuteReader(); itemDT = new DataTable(); itemDT.Columns.Add("id", typeof(string)); itemDT.Columns.Add("ar_desc",

问题 I am in a need of using DataGridComboboxColumn in my dataGrid. But the observable collection I am going to bind to my datagrid is not static ? is it necessary for that Observale collection to be static since the data grid contains a DataGridComboboxColumn . What I am going to bind to the DataGridCombobox column is another collection contained in the class of which objects are there in the observable collection I mentioned above. This is the first time I am using DataGridCombobox column. Any

问题 private List<string> mylist = new List<string>(new string[] { "Visitor Seen", "Update Reason", "Ghost Sighted! HELP!" }); private void setupDataGridView() { dataGridView1.Columns.Add("ID", "Visitor ID"); dataGridView1.Columns.Add("VisitorName", "Visitor Name"); dataGridView1.Columns.Add("SignInTime", "Sign In Time"); dataGridView1.Columns.Add("Reason", "Reason For Visit"); DataGridViewComboBoxColumn comboCol = new DataGridViewComboBoxColumn(); comboCol.Name = "comboActionableItem"; comboCol

问题 I have a DataGrid with two DataGridComboBoxColumn s set in the XAML (copied from here): <DataGrid x:Name="joinGrid" AutoGenerateColumns="False" CanUserAddRows="True"> <DataGrid.Columns> <DataGridComboBoxColumn> <DataGridComboBoxColumn.ElementStyle> <Style TargetType="ComboBox"> <Setter Property="IsDropDownOpen" Value="True" /> <Setter Property="ItemsSource" Value="{Binding Path=TableAColumns}" /> <Setter Property="ItemTemplate"> <Setter.Value> <DataTemplate> <TextBlock Text="{Binding}"><

问题 I have a datagridview which I'm using for data entry. I've done this before with all text columns, and it worked great. But now I want one of the columns to be a databound combobox so the user can select options. When I do this, the resulting gridview's datasource ends up with empty rows (but the right quantity). What am I missing? Here is code: DataGridViewComboBoxColumn cboCategory = new DataGridViewComboBoxColumn(); { cboCategory.HeaderText = "Category"; cboCategory.DataSource =

问题 Sometimes the easiest examples are the hardest to find . . . I have a datagrid with 2 columns. One column contains role information, the other column should have a combo box with a list of available users. The data in the combobox is unrelated to the data in the first column. I'm thrown off by the fact that the combobox does not have a datacontext, only an itemsource and I can't seem to use binding either. Can someone please point me to a simple example that uses two different data sets for