Applying styles to a GridView matching certain criteria
- by NickK
Hi everyone.
I'm fairly new to ASP.Net so it's probably just me being a bit stupid, but I just can't figure out why this isn't working.
Basically, I have a GridView control (GridView1) on a page which is reading from a database. I already have a CSS style applied to the GridView and all I want to do is change the background image applied in the style depending on if a certain cell has data in it or not.
The way I'm trying to handle this change is updating the CSS class applied to each row through C#. I have the code below doing this:
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
GridViewRow row = e.Row;
string s = row.Cells[7].Text;
if (s.Length > 0)
{
row.CssClass = "newRowBackground";
}
else
{
row.CssClass = "oldRowBackground";
}
}
In theory, the data from Cell[7] will either be null or be a string (in this case, likely a person's name).
The problem is that when the page loads, every row in the GridView has the new style applied to it, whether it's empty or not. However, when I change it to use hard coded examples, it works fine. So for example, the below would work exactly how I want it to:
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
GridViewRow row = e.Row;
string s = row.Cells[7].Text;
if (s == "Smith") //Matching a name in one of the rows
{
row.CssClass = "newRowBackground";
}
else
{
row.CssClass = "oldRowBackground";
}
}
It seems as if the top piece of code is always returning the string with a value greater than 0, but when I check the database the fields are all null (except for my test record of "Smith").
I'm probably doing something very simple that's wrong here, but I can't see what. Like I said, I'm still very new to this. One thing I have tried is changing the argument in the if statement to things like: if (s != null), if (s != "") and if (s == string.empty) all with no luck.
Any help is greatly appreciated and don't hesitate to tell me if I'm just being stupid here. :)
