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how to use iff with a DataBinder.Eval

hi experts,
hope you're all having as much fun as I am coding today :D
(man do i hate web coding)

anyway, i am trying to force a checkbox to be checked or not inside a Repeater control with the following statement:

<%# iif(DataBinder.Eval(Container.DataItem,"pickTeamID")=DataBinder.Eval(Container.DataItem,"teamID1"),"checked","") %>

this statemtent is sitting inside of an <input ...> tag and i am seeing an error that says:
Compiler Error Message: CS0131: The left-hand side of an assignment must be a variable, property or indexer

does it mean i need an == instead of =
or does it mean that its not possible to have it check against another column in the dataSet and that I should instead have the sproc return a computed value like 1 or 0 that i can check against like this:

<%# iif(DataBinder.Eval(Container.DataItem,"pickTeamID")=1,"checked","") %>

and if I am not even close feel free to point out I am an idiot and show me the way.

thanks.

richardsimnett

ASKER

forgot to mention this potentially useful tidbit:
both pickTeamID and teamID1 are tinyint's in the db. i dont know if that matters or what

Jason Scolaro

richardsimnett,

Are you coding in C#?

-- Jason

Jason Scolaro

richardsimnett,

IIf is a VB function, C# would be (I think this should work fine):

(DataBinder.Eval(Container.DataItem, "pickTeamID") == DataBinder.Eval(Container.DataItem, "teamID1")) ? "checked" : "";

-- Jason

richardsimnett

ASKER

yes i am using C#. let me try what you suggested

Jason Scolaro

richardsimnett,

Of course, while I'm at it, I'd recommend a <asp:CheckBox> control instead of <input>. Maybe something like:

<asp:CheckBox runat="server" id="cbTeam" Checked='<%# (DataRowView)Container.DataItem["pickTeamID"] == (DataRowView)Container.DataItem["teamID1"] %>' />

I'm primarly a VB.NET programmer, so I'm kind of taking stabs at the C# syntax -- I believe it's mighty close, but might need some tweaking.

-- Jason

richardsimnett

ASKER

still getting an error about missing a )

here's the whole line of my code. just in case i am missing something else

<td><input type=checkbox name=team_<%# DataBinder.Eval(Container.DataItem, "teamID1") %> id=team_<%# DataBinder.Eval(Container.DataItem, "teamID1") %> <%# (DataBinder.Eval(Container.DataItem, "pickTeamID") == DataBinder.Eval(Container.DataItem, "teamID1")) ? "checked" : ""; %>>  

Jason Scolaro

richardsimnett,

Whew, a syntax test, great! I'll play, here's my try at it:

<input type='checkbox' name='<%# "team_" + DataBinder.Eval(Container.DataItem, "teamID1") %>' id='<%# "team_" + DataBinder.Eval(Container.DataItem, "teamID1") %>' <%# ((DataBinder.Eval(Container.DataItem, "pickTeamID") == DataBinder.Eval(Container.DataItem, "teamID1")) ? "checked" : "") %> />

-- Jason

richardsimnett

ASKER

thanks for being such a good sport. and you are about 99% of the way there.

only one problem remains for me. the == is returning false even when both sides of it have the same value. is there a way to type cast it so it works?

for instance, can i use a Convert.ToInt32() wrapped around those DataBinder.Eval statements?

actually i just tried that and it gave me more compilation errors.

maybe a straight cast:

<%# ((int)(DataBinder.Eval(Container.DataItem, "pickTeamID") == (int)DataBinder.Eval(Container.DataItem, "teamID1")) ? "checked" : "") %>

nope. adding the (int) doesnt work either.

any more ideas?

richardsimnett

ASKER

actually i had the (int) in the wrong place there, but it still didnt work when i fixed it to this:

<%# (((int)(DataBinder.Eval(Container.DataItem, "pickTeamID")) == (int)(DataBinder.Eval(Container.DataItem, "teamID2"))) ? "checked" : "") %> />

ASKER CERTIFIED SOLUTION

Jason Scolaro

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richardsimnett

ASKER

i added another databinder.eval to print the values out and they are indeed equal.

i tried it like this and the C# compiler didnt like it (i assume had i done int's it would have also crapped its pants)
public string CheckTeams(string pickTeam, string teamID)

so i changed it to objects and added the Convert and it ran perfectly. i didnt even know you could call functions like that in your code behind class.

you helped me big time today, jason. i wish i could give you more than 500 points. you earned it.

thanks.

public string CheckTeams(object pickTeam, object teamID)
            {
                  if (Convert.ToInt32(pickTeam) == Convert.ToInt32(teamID))
                  {
                        return "checked";
                  }
                  else
                  {
                        return "";
                  }
            }

Jason Scolaro

Nice work, glad you got it going! See you around.

-- Jason