How to Highlight Datagridview CELL not a ROW.

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Hello, Below code highlight the entire row, but i need to highlight only specific CELL.

C#

private void dataGridView1_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
        {
            int colIndex = e.ColumnIndex;
            int rowIndex = e.RowIndex;


            if (rowIndex >= 0 && colIndex >= 0)
            {
                DataGridViewRow theRow = dataGridView1.Rows[rowIndex];

                if (theRow.Cells[colIndex].Value !=null)
                {
                    if (theRow.Cells[colIndex].Value.ToString() == "Normal")
                    {
                        theRow.DefaultCellStyle.BackColor = Color.Green;
                        theRow.DefaultCellStyle.ForeColor = Color.White;
                        theRow.DataGridView.DefaultCellStyle.Font = new Font("Calibri", 10);

                    }


                else if (theRow.Cells[colIndex].Value.ToString() == "Critical")
                {
                    theRow.DefaultCellStyle.BackColor = Color.Tomato;
                    theRow.DefaultCellStyle.ForeColor = Color.White;

                }

                    else if (theRow.Cells[colIndex].Value.ToString() == "Very Critical")
                    {
                        theRow.DefaultCellStyle.BackColor = Color.DarkRed;
                        theRow.DefaultCellStyle.ForeColor = Color.White;

                   }

                }

Posted 12-Mar-13 1:24am

ontheline89

Updated 12-Mar-13 19:20pm

v2

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OriginalGriff · Accepted Answer · 2013-03-12T01:43:00

Solution 1

First off, that test will never work:

C#

theRow.Cells[colIndex].Value.Equals(null)

Translates to:

C#

Object o;
o.Equals(null)

If the object being tested is null, then there is by definition no instance to call the Equals method on, and since it cannot be static, a null value will always throw an execption, before it can try to test for a null value!

You could try with:

C#

theRow.Cells[colIndex].Value == null

Which stands a better chance of working!

Posted 12-Mar-13 1:43am

OriginalGriff

Comments

Sharp Robin 12-Mar-13 17:28pm

The right way to do things. I was going to write the same answer. Vote for this.

ontheline89 13-Mar-13 0:21am

Thank you so much for your reply.

OriginalGriff 13-Mar-13 3:39am

You're welcome!

ontheline89 13-Mar-13 1:18am

One thing more i wanted to ask that, above code highlight Entire Row, how can i highlight only specific CELL ?? Thanks