Set Eval in Code Behind

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ASP.NET

<asp:GridView ID="Grd" runat="server" AutoGenerateColumns="false" CssClass="GridStyle"                                                                HeaderStyle-Font-Size="Small" Width="1001px"  Height="300px">
<Columns>
<asp:TemplateField HeaderStyle-Width="160px" Visible="false" HeaderText="Action">
<ItemTemplate>

<asp:Button ID="btnProcess" runat="server" Text="Place" OnClick="btnProcess_Click" 
CommandArgument='<%#Eval("intId") & "~" & Eval("IdECompleted") & "~" & Eval("dtECompletion") & "~" & Eval("strName") & " " & Eval("strCode") & " " & Eval("strAge") & " " & Eval("strGender") & "~" & Eval("dtStart") & "~" & Eval("strContactP") & "~" & Eval("strAdd") & "~" & Eval("strPhone") & "~" & Eval("intSalary") & "~" & Eval("bitAgree") %>

</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>

I want to use it like below but gets error: -

VB

Private Sub Grd_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles Grd.RowDataBound
If Session("poweradmin") = True Then
            Dim btnProcess As New Button
            btnProcess = CType(e.Row.FindControl("btnProcess"), Button)

            btnProcess.CommandArgument = "'<%#Eval("intId") & "~" & Eval("IdECompleted") & "~" & Eval("dtECompletion") & "~" & Eval("strName") & " " & Eval("strCode") & " " & Eval("strAge") & " " & Eval("strGender") & "~" & Eval("dtStart") & "~" & Eval("strContactP") & "~" & Eval("strAdd") & "~" & Eval("strPhone") & "~" & Eval("intSalary") & "~" & Eval("bitAgree") %>' />"

        End If
End Sub

Posted 23-Dec-11 18:51pm

Gopal Krishna Ranjan

Updated 23-Dec-11 19:42pm

v5

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3 solutions

Solution 1

Try following:

Replace all & by +:

HTML

CommandArgument='<%#Eval("intId") + "~" + Eval("IdECompleted") + "~" + Eval("dtECompletion") + "~" + Eval("strName") + "-" + Eval("strCode") + "-" + Eval("strAge") + "-" + Eval("strGender") + "~" + Eval("dtStart") + "~" + Eval("strContactP") + "~" + Eval("strAdd") + "~" + Eval("strPhone") + "~" + Eval("intSalary") + "~" + Eval("bitAgree") %>' />

UPDATED V-1

http://forums.asp.net/post/3264875.aspx[^]

http://stackoverflow.com/questions/661670/how-to-implement-conditional-formatting-in-a-gridview[^]

http://www.aspsnippets.com/Articles/Conditional-Statements-and-String-Formatting-using-Eval-in-ASP.Net.aspx[^]

http://dotnetblogger.com/post/2009/06/16/Inline-Conditional-Statement-using-Eval%28%29-or-Bind%28%29-to-ShowHide-%28Visibile%29-LinkButton-in-a-GridView.aspx[^]

UPDATED V-2
http://stackoverflow.com/questions/2359790/how-to-use-eval-in-codebehind-to-set-page-title[^]
GridView and CommandArguments

Posted 23-Dec-11 18:57pm

Monjurul Habib

Updated 23-Dec-11 19:30pm

v5

Comments

Gopal Krishna Ranjan 24-Dec-11 1:02am

I have to set it conditionally. It does not matter & and +. I am using vb.net so & is used instead of + for concatenation.

Monjurul Habib 24-Dec-11 1:15am

ok go through my updated links, you will get an idea!!

Gopal Krishna Ranjan 24-Dec-11 1:21am

I checked all. They used conditionally in .aspx page. Can you tell any other method so that i can use it in code behind page (.vb or .cs).
Thanks!

Monjurul Habib 24-Dec-11 1:31am

check updated v-2 links

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Parwej Ahamad · Accepted Answer · 2011-12-23T19:24:00

Solution 2

I think so in this situation set value in code behind with better validation. I don't know which list control you are using let say if you are using GridView then fetch control in rowdatabound event and then set the property accordingly.

Thanks

Posted 23-Dec-11 19:24pm

Parwej Ahamad

Comments

Gopal Krishna Ranjan 24-Dec-11 1:29am

I want to use it like below but gets error: -

Private Sub Grd_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles Grd.RowDataBound
If Session("poweradmin") = True Then
Dim btnProcess As New Button
btnProcess = CType(e.Row.FindControl("btnProcess"), Button)

btnProcess.CommandArgument = "CommandArgument='<%#Eval("intId") & "~" & Eval("IdECompleted") & "~" & Eval("dtECompletion") & "~" & Eval("strName") & " " & Eval("strCode") & " " & Eval("strAge") & " " & Eval("strGender") & "~" & Eval("dtStart") & "~" & Eval("strContactP") & "~" & Eval("strAdd") & "~" & Eval("strPhone") & "~" & Eval("intSalary") & "~" & Eval("bitAgree") %>' />"

End If
End Sub

Parwej Ahamad 24-Dec-11 1:34am

event : ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs

e contains dataitem property so type cast e as your datarow and then fetch all value then build property string then set it to CommandArgument

Gopal Krishna Ranjan 24-Dec-11 1:38am

please give an example

Parwej Ahamad 24-Dec-11 1:40am

which framework version you are using?

Gopal Krishna Ranjan 24-Dec-11 1:46am

framework 3.5

Parwej Ahamad 24-Dec-11 1:55am

type cast e.Row.DataItem as your row type then fetch all values from that object liek

Yourbindrow obj = e.Row.DataItem as Yourbindrow
then fectch value from this object and build the string like:
obj.intID OR obj["intID"] etc then
N
find the btnProcess control then the commandargument property with that string,

Note: I can not write the exact code because I don't have idea about the binding detail and table columns

Gopal Krishna Ranjan 24-Dec-11 2:19am

thanks dear. i got it... Thanks a-lot..

Parwej Ahamad 24-Dec-11 2:21am

Great! No issue

member60 24-Dec-11 3:11am

My 5!

Parwej Ahamad 24-Dec-11 3:15am

Thanks :)

Gopal Krishna Ranjan · Accepted Answer · 2011-12-23T20:20:00

VB

Private Sub Grd_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles Grd.RowDataBound
        If Session("poweradmin") = True Then
            If e.Row.RowType = DataControlRowType.DataRow Then
                Dim btnProcess As New Button
                btnProcess = CType(e.Row.FindControl("btnProcess"), Button)
                btnProcess.CommandArgument = DataBinder.Eval(e.Row.DataItem, "intId") & "~" & DataBinder.Eval _
                (e.Row.DataItem, "IdECompleted") & "~" & DataBinder.Eval(e.Row.DataItem, "dtECompletion") & "~" & DataBinder.Eval _
                (e.Row.DataItem, "strName") & " " & DataBinder.Eval(e.Row.DataItem, "strCode") & " " & DataBinder.Eval _
                (e.Row.DataItem, "strCurrAge") & " " & DataBinder.Eval(e.Row.DataItem, "strGender") & "~" & DataBinder.Eval _
                (e.Row.DataItem, "dtStart") & "~" & DataBinder.Eval(e.Row.DataItem, "strContactP") & "~" & DataBinder.Eval _
                (e.Row.DataItem, "strAdd") & "~" & DataBinder.Eval(e.Row.DataItem, "strPhone") & "~" & DataBinder.Eval _
                (e.Row.DataItem, "intSalary") & "~" & DataBinder.Eval(e.Row.DataItem, "bitAgree")
             End If
        End If
    End Sub