Question

Highlight a particular word in Gridview

Asked by: Anushart

Hi All,

I have Gridview Control that populates data (4 colums) from database, I would like to highlight a particular text in this GridView such as, if I want apple highlighted in the gridview then the cells that carry apple in them, must be highlighted. How do I go about doing this?

Thank you,
Anusha

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Asked On
2007-06-20 at 11:37:52ID22646716
Tags

gridview

,

highlight

,

particular

,

word

Topics

C# Programming Language

,

Programming for ASP.NET

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Answers

 

by: divinewind80Posted on 2007-06-20 at 12:35:28ID: 19327584

Are you wanting ONLY the word, or the cell that contains it?

 

by: davidlars99Posted on 2007-06-20 at 13:42:37ID: 19328073

I would do it using Javascript!!!

 

by: AnushartPosted on 2007-06-20 at 13:58:19ID: 19328206

divinewind80,

Anything is fine actually, as I have only one word in each cell.

 

by: AnushartPosted on 2007-06-20 at 13:59:04ID: 19328211

davidlars99,

If it is possible in javascript then can I know what code does the trick?

 

by: udhayakumardPosted on 2007-06-20 at 23:49:25ID: 19331018

Hi,

Change the Back Color or ForeColr of that particular Cell using the CellStyle property of that particular Cell.

-Udhaya Kumar.D

 

by: AnushartPosted on 2007-06-21 at 07:05:38ID: 19333158

udhayakumard,

But how will I identify that the cell contains the paticular word I am looking for? Can you please suggest some code for it.

 

by: davidlars99Posted on 2007-06-21 at 13:03:05ID: 19336412

Anushart, remember that regular expression is your best friend when it comes to string manipulation...  :) This is pretty simple example and very efficient too. I don't know about the others, but I'd rather take care of string manipulation business on the client side as much as I can...  :)

<html>
<head>
<script language="javascript">

      function FindReplace(elemID,word)
      {
            var table=document.getElementById(elemID);
            var rows=table.rows;
            var keyword=word.split(",").join("|");
            var regex=new RegExp("\\b("+keyword+")\\b","gi");            
            
            for (var i=0;i<rows.length;i++)
            {
                  for (var j=0;j<rows[i].cells.length;j++)
                  {
                        var html=rows[i].cells[j].innerHTML;
                        rows[i].cells[j].innerHTML=html.replace(regex," <font style='background-color:yellow;color:#000000'>$1</font> ");
                        var r="";
                  }
            }
      }
      
</script>
</head>
<body>

<table id="myTable" border="1">
      <tr>
            <td>The quick brown fox jumped over the lazy dog</td>
            <td>Another quick brown fox jumped over the lazy dog</td>
            <td>Crazy quick brown fox jumped over the lazy dog</td>
            <td>Little quick brown fox jumped over the lazy dog</td>
      </tr>
      <tr>
            <td>The quick brown fox jumped over the lazy dog</td>
            <td>Another quick brown fox jumped over the lazy dog</td>
            <td>Crazy quick brown fox jumped over the lazy dog</td>
            <td>Little quick brown fox jumped over the lazy dog</td>
      </tr>
      <tr>
            <td>The quick brown fox jumped over the lazy dog</td>
            <td>Another quick brown fox jumped over the lazy dog</td>
            <td>Crazy quick brown fox jumped over the lazy dog</td>
            <td>Little quick brown fox jumped over the lazy dog</td>
      </tr>
      <tr>
            <td>The quick brown fox jumped over the lazy dog</td>
            <td>Another quick brown fox jumped over the lazy dog</td>
            <td>Crazy quick brown fox jumped over the lazy dog</td>
            <td>Little quick brown fox jumped over the lazy dog</td>
      </tr>                  
</table>

<script language="javascript">

      FindReplace("myTable","quick,dog,jumped");

</script>

</body>
</html>

 

by: davidlars99Posted on 2007-06-21 at 13:03:44ID: 19336425

var r=""; doesn't really belong there... I was using it for debugging...

 

by: davidlars99Posted on 2007-06-21 at 13:20:43ID: 19336572

as you see u can pass multiple keywords to FindReplace(..) function separated by a "," or just a single word...

 

by: udhayakumardPosted on 2007-06-21 at 23:29:16ID: 19339307

Hi,

If u want to highlight when adding to the grid then its simple while adding check the value of that cell the change the color. For example:

dataGridView1.Rows[0].Cells[1].Value = "Some value";

               if (dataGridView1.Rows[0].Cells[1].Value.ToString().Equals("Highlight Word"))
               {
                   DataGridViewCellStyle dsstyle = new DataGridViewCellStyle();
                   ds.BackColor = Color.Yellow;
                   ds.ForeColor = Color.Black;

                   dataGridView1.Rows[0].Cells[1].Style = dsstyle;
               }

 

by: AnushartPosted on 2007-06-22 at 09:29:24ID: 19342708

udhayakumard:

Yes, that is what I wnat to do, but when I used the code you suggested, DatagridViewCellstyle was not being recognised, I checked the assembly references and the drawing reference has been included... So I tried to modify the code a little bit and here is what I have, but when I try to debug it..

  if (GridView1.Rows[i].Cells[j].Equals("QueryTerm")) this line is not working correctly

Please correct it if possible...

   DataSet ds = new DataSet();
            da.Fill(ds, "Tables");            
            GridView1.DataSource = ds.Tables[0];
            GridView1.DataBind();
            int nr = GridView1.Rows.Count;
            int nc = GridView1.Columns.Count;
            for (int i = 0; i < nr; i++)
            {
                for (int j = 0; j < nc; j++)
                {
                    if (GridView1.Rows[i].Cells[j].Equals("QueryTerm"))
                    {
                        GridView1.Rows[i].Cells[j].BackColor = Color.LightGoldenrodYellow;

                    }
                }
            }
        }

 

by: AnushartPosted on 2007-06-22 at 11:06:15ID: 19343492

Well actually this condition itself is not working

 if (GridView1.Rows[3].Cells[3].Equals(QueryTerm))
                    {
                        GridView1.Rows[3].Cells[3].BackColor = Color.LightGoldenrodYellow;

                    }


I am sorry I included "" for queryterm in the previous post.

 

by: davidlars99Posted on 2007-06-22 at 14:54:58ID: 19345192

if (Regex.IsMatch(GridView1.Rows[3].Cells[3].Text, "(?i-s-x:\\b("+QueryTerm+")\\b)"))
{
     GridView1.Rows[3].Cells[3].BackColor = Color.LightGoldenrodYellow;
}

 

by: AnushartPosted on 2007-06-25 at 10:00:09ID: 19357226

Thank you, davidlars99

You were right that reg exp are our best friend for string manipulation :)

Also thank you udhayakumard for your suggestion

 

by: davidlars99Posted on 2007-06-25 at 15:44:36ID: 19359811

Even though they are best friends, could also be your worst enemies, but I'm sure you can figure when to use and when not to use them... And of course, you are welcome!

Don't do it on the server, do it on the client, Javascript that is...

Take care,
David

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