I have a ComboBox and its items source is an SQL table.
I would like that the user will choose the value he likes and if the value is not in the list, he would be able to type the value into the ComboBox. Is it possible?
Thanks.
You need to set the IsEditable property of the ComboBox to True. This will allow you to edit the contents as well as select any of the populated items in the combo box.
Related
I am working with Syncfusion tools, and am trying to add a ComboBoxAutoComplete control to a Windows form. I have a DataTable that I'm using as my DataSource with two columns: ID and Name. I set the DataSource, DisplayMember, and ValueMember properties like so:
ComboBox1.AutoCompleteControl.DataSource = table
ComboBox1.DisplayMember = "Name"
ComboBox1.ValueMember = "ID"
The control loads correctly, but it appears that the DisplayMember does not get applied. The control will display only the ID of the selected item. When I expand the drop-down, it displays the entire table (both columns). I tried setting the DisplayMember and ValueMember directly on the AutoCompleteControl, but those properties do not exist. Is there a different property that is used to control what text is displayed in the ComboBoxAutoComplete control?
We have prepared the simple sample in which we have assigned data table to "DataSource" property of AutoCompleteControl inside the ComboBoxAutoComplete to enable the AutoComplete features.
To display the value based on DisplayMember assigned the Data table columns to “Columns” (collection property) of AutoCompleteControl and set “MatchingColumn” value as True for which column has been set in DisplayMember.
Please check with the sample from below location.
Sample: ComboBoxAutoComplete_Sample
Regards,
Keerthana J
I have a VB6 application that has been running for quite sometime. Currently I'm trying to update one of the form that has a combobox 2.0. Because the combobox is populated with hundreds of items - I'm trying to update it so that users are able to click on a look up button next to it, where another window opens up with all the items from the combobox. User will be able to search by keyword and/or select an item and double click on it and have it appear in the combobox. The issue I'm having is with trying to pass no value or "" when CANCEL is clicked. I'm able to pass the value if I in the properties window my STYLE Is set to COMBO rather than list. However, the issue I come across is that with COMBO the value (text) in the combobox sometimes is not aligned properly. Is there a way to pass a "" value to a combobox 2.0 without changing the style to COMBO?
If they hit cancel set the ListIndex of your combo to -1 rather than setting the text property. This is the value for no item being selected.
If I setup a lookup for a field when designing a table (i.e. through the Lookup Wizard) and I set "Allow Multiple Values" to "Yes", a multi-select combobox (i.e. with check-boxes) is displayed in the relevant field in the "Datasheet" view of the table. My question is the following: Is the text-box component of a multi-select combobox control actually of any use? While a single-select combobox lets you type a new value that is not in the list or facilitates the auto-complete feature when typing a value that is included in the list, but the multi-select combo box prevents you from typing anything in its textbox, and that behavior doesn't seem to change via the properties of the combobox control.
The reason I need this feature is because I want to type there something not in the list, in order to trigger the control's NotInList event, so that I can update the corresponding lookup table with the new value I typed.
Thanks
This should be easy but Windows.Forms surprises me again:
var comboBox2 = new ComboBox();
comboBox2.Items.Insert(0,"Hoi");
comboBox2.Items.Insert(1,"Hoi");
comboBox2.Items.Insert(2,"Hoi");
comboBox2.SelectedIndex = 1;//I want to select the SECOND item
If I openup the combobox (by clicking on it with the mouse) the FIRST item is selected. This does not occur when the items have different texts. How can I select the second item on this combobox?
Use something like this,
comboBox2.Items.Insert(0,"Hoi");
comboBox2.Items.Insert(1,"Hui");
comboBox2.Items.Insert(2,"Hai");
and after this try giving
comboBox2.SelectedIndex = 1;
and also if you want select an item, always the index will starts from 0.
If you have a proper datasource set the following properties:
1. DataSource2. DisplayMember and 3. ValueMember
If you dont have the data source, try setting the following properties:
1. SelectedIndex and
2. Text
I have an Ext.grid.EditorGriPanel which has an combobox editor in its columnModel (the store of combox has just only 2 items: enabled/disabled). When a new blank row is inserted to grid, I want the combobox in that column have to be set to a default value (enabled), and the dropdown is not expanded.
I've tried to use
grid.colModel.columns[2].editor.select(0)
to get the combobox editor and set "enabled" value for it, but it did not work. Another way is using grid.colModel.columns[2].getCellEditor(rowIndex), but it returns an EditorGrid (I was so surprised because the ExtJS 3.3.1 API doesn't have this component).
Could you please help me on this problem?
Thank you so much!
When a new blank row is inserted to
grid, I want the combobox in that
column have to be set to a default
value (enabled), and the dropdown is
not expanded.
When the new record is inserted to the grid's store, the value of your column (in the record) needs to be set to "enabled". I'm not sure if you are doing it like this currently? In other words, the value must not be set to the editor of the column. Set it directly in the record.
(Also, you can define default values to be used for all records using the recordType property of the store - see ExtJS API documentation for more details - but this is optional.)
Finally, note that the combobox will not be displayed immediately after the row is added. The combobox is displayed only when you start editing that particular cell - this is the way EditorGrid works in ExtJS. But at least you should get the new row to immediately display the correct value ("enabled") with this advice.