I'm working on a windows forms app and there is a Janus GridEx component with 3 columns. I don't want users to change the values in the first two columns but I can't find the way to make readonly or allowedit false for the first two columns and third column editable.
I've tried changing the editmode but no luck either... anyone out there knows how?
Have you tried:
column.EditType = Janus.Windows.GridEX.EditType.NoEdit;
?
If you change the column's Selectable property to false, the user will not be able to edit it. You can set this property in the designer or in code. Here is an example which locks down the id column:
GridEXColumn idColumn = gridEX1.RootTable.Columns["id"];
idColumn.Selectable = false;
Related
I have a problem with Janus Grid. I am trying to make cell of the one column to be edit so user can change value in particular cell.
I try:
this.myJanusGrid.RootTable.Columns[0].EditType = Janus.Windows.GridEX.EditType.TextBox
and
this.myJanusGrid.RootTable.Columns[0].Selectable=true
None of these two attempt were successful.
Thank's in advance for any help and suggestion!
Use this:
this.myJanusGrid.RootTable.AllowEdit = Janus.Web.GridEX.InheritableBoolean.True;
If you have more columns that you don´t want them to be editable, in adittion you should do a column bucle and mark each column you don´t want to be editable this way (VB):
For Each column As GridEXColumn In myJanusGrid.RootTable.Columns
If column.Key.ToUpper() <> "EDITABLE_COLUMN_NAME" Then
column.SelectableCells = SelectableCells.None
End If
Next
I cannot make single column to be editable in DataGridView. I tried to do it in the designer but didn't get positive results. I tried scripting it like
datagridview1.Columns["theColumn"].ReadOnly=false;
but that didn't work. Seems like the property of ReadOnly in DataGridView is only that is considering, no other modifications count. I actually try to make DataGridViewColumn that contains CheckBoxes editable, while other columns I get from DataBase.
You can easily do it through the Edit Column wizard of the grid view, Go to edit column windows and select the columns that you want to make read only and in the right pane just set the ReadOnly property to true.
Visual Studio did not allow me to set single column ReadOnly property false when Enable Editing property of DataGridView is unchecked(???). But HOKBONG's comment helped. Thanks guys.
I have an Infragistics grid and I want to disable and enable some columns based upon some requirement. I have read some articles that say to use AllowUpdate = DefaultableBoolean.True but it did not work for me.
I suppose that when you talk of disabled columns you mean disable editing in these columns.
Also you don't specify the language, so I will use C#
UltraGridColumn c = grdWork.DisplayLayout.Bands[0].Columns["YourColumnName"];
c.CellActivation = Activation.NoEdit;
c.CellClickAction = CellClickAction.CellSelect;
The property CellActivation could also be set to Activation.Disabled or Activation.ActivateOnly.
The property CellClickAction allows to set an appropriate selection status for the cell clicked. You could use CellSelect or RowSelect. (This last one, to mimic the behavior of a ListBox)
As usual, the real difficulty is to find the correct property. Then Intellisense will give you a quick and fair explanation of the meaning of these values.
If you just want to show and hide the columns as needed then you can try the following.
UltraGrid myGrid = new UltraGrid();
//Bind to your data here
myGrid.DisplayLayout.Bands[0].Columns["ColumnName"].Hidden = true;
I'm working on a GUI that allows the user to manipulate xml files. I display the xml file in a datagridview organized neatly by columns through xml elements. I allow the user to add columns as an extention on my project. The column gets added to the dataset table, then updated to the datagridveiew that I use to display the xml file in. I've included the ability for the user to add a combobox column to select choices instead of entering them in constantly like.. true or false. However, that is where the problem lies. Saving a normal column was easy. The combobox column is being a pain.
I have a "save combobox column" to have it updated to the xml and a "save" button to save in a destination of the user's choice.
I've done some research and it seems like the combobox class has such a feature to gain access to the selecteditem in the combobox put in by the user.
Where we have:
ComboBox box = new ComboBox();
box.SelectedItem;
I tried applying this to the combobox column class but it does not have such a function. Thus, I cannot figure out how to directly obtain the value of the user's selected item. I tried experimenting with comboboxcell's as well, but that didn't lead me anywhere either. Both those classes I played around with do not have a... "selected item" function and even google does not have a solution for me. =( I've also tried using the cell.value, but it is "null" for some reason. Even when the user selects an item in the box, it doesn't get saved into the cell's value.
TLDR:
My question in short is, how, if possible, do you gain access to the comboboxcolumn cell's selected item? Additionally, how would you then ensure that the item value is saved in the cell?
Thanks in advance. I'm using .NET 3.5 SP1, through Visual Studio 2008 C#.
Sincerely,
tf.rz
The Control in a DataGridView is not a ComboBox, it is a DataGridViewComboBox and has different properties and methods. From MSDN
Unlike the ComboBox control, the DataGridViewComboBoxCell does not have SelectedIndex and SelectedValue properties. Instead, selecting a value from a drop-down list sets the cell Value property.
However, you mentioned that the Cell.Value is null for you. Well there may be another step you are missing according to the following article (How to: Access Objects in a Windows Forms DataGridViewComboBoxCell Drop-Down List).
You must set the DataGridViewComboBoxColumn.ValueMember or DataGridViewComboBoxCell.ValueMember property to the name of a property on your business object. When the user makes a selection, the indicated property of the business object sets the cell Value property.
If we have bound a datagridcomboboxcell with a different DisplayMember and ValueMember, like so:
dgcombocell.DisplayMember = "Name";
dgcombocell.ValueMember = "Id";
dgcombocell.DataSource = dataset1.Tables[0];
Then for getting SelectedText, and SelectedValue, we can write this code:
string SelectedText = Convert.ToString((DataGridView1.Rows[0].Cells["dgcombocell"] as DataGridViewComboBoxCell).FormattedValue.ToString());
int SelectedVal = Convert.ToInt32(DataGridView1.Rows[0].Cells["dgcombocell"].Value);
I hope it solves your problem.
Use this to get or set selected value:
object selectedValue = currentRow.Cells["comboboxColumnName"].Value
Don't forget to set DisplayMember and ValueMember for your DataGridViewComboBoxColumn
This is how it is done
DataGridViewComboBoxCell comboCell = (DataGridViewComboBoxCell)dgv.Rows[0].Cells[1];
MessageBox.Show(""+comboCell.Items.IndexOf(comboCell.Value));
A .Net combox is actually a composite control made up of a textbox and a dropdownlist. Use box.Text to get the currently displayed information.
EDIT: The row or the cell should have a .FindControl() method. You'll need to do something like:
Combobox box = (Combobox)(row.FindControl("[combobox ID]"));
string val = box.Text;
Basically, you're finding the control within its container (row or cell), then casting the control found as a combobox, then accessing its .Text property.
I use this:
private int GetDataGridViewComboBoxCellSelectedIndex(DataGridViewCell d)
{
return ((DataGridViewComboBoxCell)d).Items.IndexOf(d.Value);
}
Again a c# question I cant't seem to figure out:
I have a datagridview on my form. In Visual Studio design mode, I enter 4 columns: refernce, country, name & city.
After a searchform is filled in, I try to refresh the datasource: A custom class fetches all the data from the selected table and fills the datagridview. The problem is: the datagridview now has all the columns of the table, and I only want the 4 columns entered in design mode.
I can put all the other columns on visible = false in design mode, and that works. But I want this datagridview as a custom control. So I only want to show the 4 entered columns, without disabling all the others. The data which is invisible is used to bind to a panel with other Controls like TextBoxes.
Does somebody know if this is possible, and how I should try to solve this?
Thanks!
You have three ways of hide columns.
1.- setting the visible property to false (as ksogor said) and don't create columns in design mode. Note that
GridView1.Columns["ColumnName"].Visible = false;
is more readable and mantenible that
GridView1.Columns[1].Visible = false;
2.- setting AutoGenerateColumns to false and create columns in the designer
3.- in your class, set the attribute [Browsable(false)] in the fields you don't want to show. Don't create columns in design mode.
The third way will hide the column in all the datagrids of your app. I love it.
[Browsable(false)]
public string Something{get;set;}