Sizing the column header's

Question

Sizing the column header's

OmkarHcl 206

Hi ,
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I have a datagridview with 5 columns . during run time i saw that there is some space left as shown the figure . Can we adjust it at so that it must not show if in the future the number of columns increase or decrease .

Anonymous

2023-10-09T02:42:55.9466667+00:00

Hi @OmkarHcl , Welcome to Microsoft Q&A,

Did you modify the custom datagridview without re-adding or updating the reference. This may prevent it from updating. Try recreating the project to see if the error still occurs?
Anonymous

2023-10-19T09:40:18.9933333+00:00

Hi @OmkarHcl , Is there any update in this issue?

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Anonymous

2023-10-09T02:42:55.9466667+00:00

Hi @OmkarHcl , Welcome to Microsoft Q&A,

Did you modify the custom datagridview without re-adding or updating the reference. This may prevent it from updating. Try recreating the project to see if the error still occurs?
Anonymous

2023-10-19T09:40:18.9933333+00:00

Hi @OmkarHcl , Is there any update in this issue?

Answer 1

KOZ6.0 6,735

dataGridView1.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill;

or Set the AutoSizeMode of the last column to Fill

var column = dataGridView1.Columns.GetLastColumn(DataGridViewElementStates.Visible,
                                    DataGridViewElementStates.None);
column.AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill;

OmkarHcl 206

@KOZ6.0 , the problem with this approach is
the column which i have marked as readonly(in my other question) gets disappear

   public sale_purchase_datagridview()
        {
            this.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill;
            this.BackgroundColor = Color.FromArgb(250, 243, 198);
            this.RowsDefaultCellStyle.BackColor = Color.FromArgb(250, 243, 198);
            this.DefaultCellStyle.SelectionBackColor = Color.FromArgb(168, 201, 170); // full row select color 
            this.RowHeadersVisible = false;
            this.CellBorderStyle = DataGridViewCellBorderStyle.None;
            this.ScrollBars = ScrollBars.None;
            this.SelectionMode = DataGridViewSelectionMode.FullRowSelect;
            this.MultiSelect = false;
            this.AllowUserToResizeColumns = false;
            this.AllowUserToResizeRows = false;
            this.RowTemplate.Height = 30;
            this.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill;
            InitializeComponent();
           
        }
        protected override void OnEnter(EventArgs e)
        {
           
            this.CurrentCell = this.Rows[0].Cells[0];
            this.BeginEdit(true);

            //change cell color on enter
            DataGridViewCellStyle fooCellStyle = new DataGridViewCellStyle();
            fooCellStyle.BackColor = System.Drawing.Color.FromArgb(0,0,0);
            this.CurrentCell.Style.ApplyStyle(fooCellStyle);



            base.OnEnter(e);
           

        }

        // 5th column should always be readonly
        protected override void OnColumnAdded(DataGridViewColumnEventArgs e)
        {
            base.OnColumnAdded(e);
            if (e.Column.Index == 5)
            {
                e.Column.ReadOnly = true;
            }
        }

KOZ6.0 6,735 Reputation points

2023-10-08T12:50:11.04+00:00

try the second idea.
OmkarHcl 206 Reputation points

2023-10-08T12:54:35.15+00:00

@KOZ6.0 , an exception
KOZ6.0 6,735 Reputation points

2023-10-08T13:01:01.96+00:00

DataGridView don't know if it's the last column. The person who added it knows that.Therefore, you will write that code inside the Form.

However, if the last column is fixed, you can use the same method as ReadOnly.

KOZ6.0 6,735

It seems better to do it like this

DataGridViewAutoSizeColumnMode prevMode = DataGridViewAutoSizeColumnMode.NotSet;

protected override void OnColumnAdded(DataGridViewColumnEventArgs e) {
    base.OnColumnAdded(e);
    if (!DesignMode) {
        if (e.Column.Index > 0) {
            Columns[e.Column.Index - 1].AutoSizeMode = prevMode;
        }
        prevMode = e.Column.AutoSizeMode;
        e.Column.AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill;
    }
}

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Sizing the column header's

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