Question

Hi I have a Windows Form application. I have a Textbox. I want to implement a functionality like when the user clicks on the textbox, a list should be made available to the user and then the item selected from the list should be filled in the textbox. The list should not be available if some other control is focussed other than the textbox. What would be the better way to do this? Should I implement the list in the same form as the textbox or should I use another form for the list?

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I want to implement a functionality like in the Tally Accounting
Software.

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Answer 1

There is a few events for the text box control you can use for this.

You could use Enter and Leave to control the .Visible or .Enabled property of your list.

Use one list and dynamically fill using the enter and leave. You will need a marker to indicate what textBox you are manipulating.

Example

    TextBox activeText;
    private void txtBox1_Enter(object sender, EventArgs e)
    {
          lstMyList.dataSource = list1Data;
          activeText = (TextBox)sender;

    }

    private void lstMyList_SelectedValueChanged(object sender, EventArgs e)
    {
         ListBox myList = (ListBox)sender; 
         activeText.Text = myList.SelectedValue.ToString();

    }

Maybe something like that?