如何突出显示Datagridview CELL而不是ROW。 [英] How to Highlight Datagridview CELL not a ROW.

问题描述

您好，下面的代码突出显示整行，但我只需要突出显示特定的CELL。

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

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;

                   }

                }

推荐答案

首先，该测试永远不会有效：

First off, that test will never work:

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

转换为：

Translates to:

Object o;
o.Equals(null)

如果被测试的对象为null，那么根据定义，没有实例可以调用Equals方法on，因为它不能是静态的，null值总是会抛出一个execption，然后才能尝试测试null值！



你可以试试：

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:

theRow.Cells[colIndex].Value == null

其中有更好的工作机会！

Which stands a better chance of working!

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