How to set row color based on column condition in asp.net website

Question

 protected void MyGrid_RowDataBound(object sender, GridViewRowEventArgs e)
    {
    if (e.Row.RowType == DataControlRowType.DataRow)
        {
        Image img = (Image)e.Row.FindControl("Status");
            int msgid;

            int.TryParse(Convert.ToString(DataBinder.Eval(e.Row.DataItem, "MsgID")), out msgid);            
            string status = Convert.ToString(DataBinder.Eval(e.Row.DataItem, "MessageActive"));
        if(status.Equals("No"))
        {
            e.Row.BackColor = Color.Red;
        } 
         //Based on some condition I am assigning images to the row
           if (value >= Toptarg)
            {
                img.ImageUrl = "Styles/Images/GreenBox.jpg";
                img.ToolTip = "Met Top Target";
                img.AlternateText = "Met Top Target";
            }
            else
            {
                img.ImageUrl = "Styles/Images/AmberBox.jpg";
                img.ToolTip = "In Progress";
                img.AlternateText = "In Progress";
            }

         }
      }

I have a gridView and it has a column named MessageActive, In the row databind I get the value of the messageActive. If the messageActive value is 'Yes' no changes are required. If it is 'No' I want to display the particular row in red color, How can I set the row background Color in row databound

Some properties of the grid view

   <RowStyle BackColor="White" />
   <AlternatingRowStyle BackColor="MistyRose" />
   <FooterStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
   <PagerStyle BackColor="#2461BF" ForeColor="White" HorizontalAlign="Center" />
   <HeaderStyle BackColor="#696969" Font-Bold="True" ForeColor="White" />

Namespace using System.Web.UI.WebControls; using System.Drawing;

I am getting this error

 'Image' is an ambiguous reference between 'System.Web.UI.WebControls.Image' and 'System.Drawing.Image'

Source Error:


Line 56:         if (e.Row.RowType == DataControlRowType.DataRow)
Line 57:         {
Line 58:             Image img = (Image)e.Row.FindControl("Status");
Line 59:             int msgid;
Line 60:             int.TryParse(Convert.ToString(DataBinder.Eval(e.Row.DataItem, "MsgID")), out msgid);

I solved my error by using System.Web.UI.WebControls.Image img = (System.Web.UI.WebControls.Image)e.Row.FindControl("Status"); — Mark
– Mark, Commented Oct 24, 2011 at 12:02

Edwin de Koning · Accepted Answer · 2011-10-24 11:43:02Z

1

Try this:

string status = Convert.ToString(DataBinder.Eval(e.Row.DataItem, "MessageActive"));
if (status == "No")
{
    e.Row.BackColor = Drawing.Color.Red
}

answered Oct 24, 2011 at 11:43

Edwin de Koning

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2 Comments

Mark Over a year ago

I did the same thing it, Drawing does not exist in current context error. I included using System.Drawing; but still same error

Edwin de Koning Over a year ago

@Mark: You probably need an additional reference to System.Drawing.Color in your project.

Davide Piras · Accepted Answer · 2011-10-24 11:46:38Z

1

add this in your method:

if(status.Equal("No"))
{
  e.Row.BackColor = Color.Red; // or Color.FromName("#FF0000");
}

as side note, I would manipulate the color or other styles in the PreRender event handler and not in the RowDataBound...

Edit: You should add the reference to the .NET assembly System.Drawing as by default it is not included in the ASP.NET web project templates...

answered Oct 24, 2011 at 11:46

Davide Piras

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Comments

Kevin Holditch · Accepted Answer · 2011-10-24 12:00:18Z

1

You need to change this line:

Image img = (Image)e.Row.FindControl("Status");

To explictily reference the image class you want so for example:

System.Web.UI.WebControls.Image img = (System.Web.UI.WebControls.Image)e.Row.FindControl("Status");

Or to the other class if you want to use that one.

answered Oct 24, 2011 at 12:00

Kevin Holditch

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