Solved

GridView Cell Color Red If Text Empty?

Posted on 2011-03-03
6
784 Views
Last Modified: 2012-05-11
The following code changes the entire column to Red, however I would like to just change Only cells with empty text.

Q. How can I change Only certain Cells Red and not the entire column?

    protected void gridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            if(e.Row.Cells[7].Text.Contains(""))
                e.Row.Cells[7].BackColor = System.Drawing.Color.Red;
        }
    }
0
Comment
Question by:pointeman
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 2
6 Comments
 
LVL 10

Expert Comment

by:himanshut
ID: 35032861
maybe coz your that column would be empty that's why the condition is true to get the cell color Red
0
 
LVL 11

Accepted Solution

by:
MajorBigDeal earned 500 total points
ID: 35033337
I was having a similar problem and I used the following logic in the page load event instead of the row binding to get around it.

DataTable dt = (DataTable)gridView.DataSource;
int rowIndex = 0;
foreach (GridViewRow gvr in gridView.Rows)
{
gvr.DataItem = dt.Rows[rowIndex++];
DataRow dr = (DataRow)gvr.DataItem;                
object[] oa = dr.ItemArray;
if (oa[7].ToString().Length == 0)
{
gvr.Cells[7].BackColor = System.Drawing.Color.Red;
}
}
0
 

Author Comment

by:pointeman
ID: 35037079
Okay, here's how it's done in RowDataBound (similar to MajorBigDeal).

I can now read text of both:
asp:BoundField
asp:TemplateField (Text='<%# Bind("FirstName") %>'>).


    protected void gridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
            foreach (GridViewRow row in gridView1.Rows)
            {                              
                if(row.Cells[6].Text == "10")
                row.Cells[6].BackColor = System.Drawing.Color.Red;

                if(((Label)row.FindControl("label1")).Text == "Jim")
                    ((Label)row.FindControl("label1")).BackColor = System.Drawing.Color.Green; //right-next to cell[6].

            }    
    }
0
Creating Instructional Tutorials  

For Any Use & On Any Platform

Contextual Guidance at the moment of need helps your employees/users adopt software o& achieve even the most complex tasks instantly. Boost knowledge retention, software adoption & employee engagement with easy solution.

 

Author Comment

by:pointeman
ID: 35037372
New Problem:
  1. asp:CommandField won't 'fire', throws error:
        "Object reference not set to an instance of an object."
   
However, asp:ButtonField works fine.
0
 
LVL 11

Expert Comment

by:MajorBigDeal
ID: 35041069
Yes but it doesn't make sense to put that in row data bound because you are iterating the entire grid for every row. For example, if your grid has 100 rows , your loop will run 10000 times.  I guess it doesn;t really matter but I think it would be better in the page load.  

I want to help with your new problem, but there isn't enough info,  Also, if you open a new question for that, you'll probably get more responses since experts are always jumping on new questions.
0
 

Author Comment

by:pointeman
ID: 35059938
I'll give you points because your solution works, but not in RowDataBound.
0

Featured Post

Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

I recently went through the process of creating a Calendar Control of events with the basis of using a database to keep track of the dates that are selectable, one requirement was to have the selected date pop-up in a simple lightbox.  At first this…
In an ASP.NET application, I faced some technical problems. In this article, I list them out and show the solutions that I found.  I hope it will be useful. Problem: After closing a pop-up window, the parent page should be refreshed automaticall…
Nobody understands Phishing better than an anti-spam company. That’s why we are providing Phishing Awareness Training to our customers. According to a report by Verizon, only 3% of targeted users report malicious emails to management. With compan…
I've attached the XLSM Excel spreadsheet I used in the video and also text files containing the macros used below. https://filedb.experts-exchange.com/incoming/2017/03_w12/1151775/Permutations.txt https://filedb.experts-exchange.com/incoming/201…

739 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question