Change forecolor of gridview cell based on condition in ASP.NET C#

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I need to change the gridview cell color to red if the value is <=0. I have tried the below piece of code and it doesn't take the cell value of each row.

How can I get each cell value of gridview.

What I have tried:

I am using the below piece of code in RowDataBound event.

if (e.Row.RowType == DataControlRowType.DataRow)
        {
            foreach (GridViewRow row in GridView1.Rows)
            {
                for (int i = 0; i < GridView1.Columns.Count; i++)
                {
                    TableCell cell = row.Cells[i];
                    int quantity = int.Parse(cell.Text);
                    if (quantity <= 0)
                    {
                        cell.ForeColor = Color.Red;
                    }
                }
            }
        }

Posted 11-Jan-18 1:42am

vignesht50

Updated 11-Jan-18 1:58am

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Karthik_Mahalingam 11-Jan-18 8:52am

can you post the mark up code for gridivew.

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Maciej Los · Answer 1 · 2018-01-11T01:58:00

You're pretty close... If you would like to change forecolor for specific column, for example: "Rate", check this:

C#

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        // grab the Label Control.
        Label lblRate = e.Row.FindControl("lblRate") as Label;
        // get the value from the datasoure like this
        Double rate = Convert.ToDouble(Convert.ToString(DataBinder.Eval(e.Row.DataItem, "Rate")));
        if (rate <= .0)
        {
            // grab the cell where that label resides
            DataControlFieldCell d = lblRate.Parent as DataControlFieldCell;
            // change the backcolor like this
            d.BackColor = System.Drawing.Color.Red;
            // change the row color like this
            e.Row.BackColor = System.Drawing.Color.LightBlue;
            // change the text color like this
            lblRate.ForeColor = System.Drawing.Color.White;
        }
    }
}

For further details, please see: How to make a Gridview Row Color/ Cell Color/ Text Color « Devils Work[^]

You might be interested in some sort of validation too: Tutorial 19: Adding Validation Controls to the Editing and Inserting Interfaces[^]