为什么在显示或加载事件时我的表单大小无法正确调整？

Question

I have a form with:

DataGrid
SaveButton
CancelButton

Positioned one under another. I call the folowing method when the form is shown and resized:

private void resize(object sender, EventArgs e)
        {
            int totalRowHeight = thresholdsDataGridView.ColumnHeadersHeight;

            foreach (DataGridViewRow row in thresholdsDataGridView.Rows)
                totalRowHeight += row.Height;

            thresholdsDataGridView.Height = totalRowHeight; 
            this.Height = totalRowHeight + closeButton.Height + saveChangesButton.Height;
        } 

This works well when resizing but when showing it it does not add enough height (the bottom button is not shown). Can someone shed some light on this?

Screenshot of the desired result:

Answer 1

It seems that you have every control placed over each other. To make this design simpler, set:

Buttons' anchors to: "Bottom, Left, Right" and DataGridView's anchor to: "Top, Bottom, Left, Right" in designer.

Then add this variable to your form's class' root:

int originalHeight;

Set the "originalHeight" in your form's constructor:

originalHeight = this.Height;

Then each time a new row is added, run:

private void resize(object sender, EventArgs e)
{
   int rowsHeight = thresholdsDataGridView.Rows.GetRowsHeight(DataGridViewElementStates.Visible);
   this.Height = originalHeight + rowsHeight;
}