Set Display format for winform DataGridView

问题

I am new to WinForms development, currently I am maintaining an application developed in .Net 2.0

In the application, I have grid with column called Length which displays the value with unit. I have used CellFormatting event to format the cell value, otherwise it is just number.

But when user start editing I wouldn't want unit to be displayed, user should be allowed enter only numbers.

Is there any straight forward way to do it? Events or Properties to be set on the grid?

回答1:

You should set the unit in the event DataGridView_CellFormatting

void DataGridView_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
{
    if (e.ColumnIndex == 1)
    {
        int value;
        if(e.Value != null && int.TryParse(e.Value.ToString(), out value))
        {
            e.Value = value.ToString("#mm");
        }
    }
}

回答2:

You should handle the EditingControlShowing event to change the current cell format.

    private void dataGridView1_EditingControlShowing(object sender, 
                               DataGridViewEditingControlShowingEventArgs e)
    {
        if (dataGridView1.CurrentCell.ColumnIndex == 1)
        {
            e.CellStyle.Format = "#";
            e.Control.Text = dataGridView1.CurrentCell.Value.ToString();
        }
    }

回答3:

You can Set you Format String using CellStyle Builder an set the Custom format to # mm

How to do it :

Right click on Grid, then Properties
In the property window, click the button that will popup up the Edit Columns Dialog
Select the cell you want to format
On the right side of the Edit Columns Dialog select the DefaultCellStyle property
Click the DefaultCellStyle property, then the CellStyleBuilder dialog will open
Here you have the format property, this will give you the Format String Dialog
Set the Custom property to #mm you will see the preview at the bottom
Click OK ... till you are back to your Grid...

来源：https://stackoverflow.com/questions/11340292/set-display-format-for-winform-datagridview

标签

winforms

datagrid