Checkbox in Gridview

Question

User66371569 posted
Hi i have checkbox inside gridview
what i want to get value of forexsample cells(2) when checked

but i want it frist check only second third ...... ignored

not first row first check whatever row is but in first check only i hope u understand me

Answer 1

User-1716253493 posted

Hard to understand your requirement, but i hope that it's not harder than understand vb or c#

        Dim pass As Boolean = False
        Dim fisrtchekvalue As String
        For Each row As GridViewRow In GridView1.Rows
            If Not pass Then
                Dim cb As CheckBox = CType(row.FindControl("cb1"), CheckBox)
                If cb.Checked Then
                    fisrtchekvalue = row.Cells(1).Text
                    pass = True
                End If
            End If
        Next

Answer 2

User66371569 posted

I tried  this code but still  give me value whenever I checked

I will explain it        forexample    I have 5 rows gridview  and all rows has checkbox      I want  user when checkbox first time    get value for  ex. cell(9)

when he check another row nothing happened    I want keep first value checked only    maybe user chakeck last row or first row or middle    I don't care    I care only  in first check

Answer 3

User-1716253493 posted

use viewstate or session to store pass(boolean)

Use gv databound to set pass = false

use check changed event to set the value and pass = true

only pass = false to set new value

Answer 4

User61956409 posted

Hi thepast,

thepast

forexample  I have 5 rows gridview and all rows has checkbox, I want  user when checkbox first time, get value

You can maintain a flag that indicates if the row is user's first checked row, as oned_gk mentioned, you can use session retain that flag etc. The following example works for me, you can refer to it to achieve your requirement.

<div>
    <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false">
        <Columns>
            <asp:TemplateField>
                <ItemTemplate>
                    <asp:CheckBox ID="chk" runat="server" OnCheckedChanged="chk_CheckedChanged" AutoPostBack="true" />
                </ItemTemplate>
            </asp:TemplateField>
            <asp:BoundField HeaderText="ID" DataField="ID" />
            <asp:BoundField HeaderText="Name" DataField="Name" />
        </Columns>
    </asp:GridView>
    <br />
    <asp:Label ID="lblresult" runat="server" Text=""></asp:Label>
</div>

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
    If Not IsPostBack Then
        
        'bindgrid

        Session("is_first_checked") = True

    End If
End Sub

Protected Sub chk_CheckedChanged(sender As Object, e As EventArgs)
    Dim chk As CheckBox = CType(sender, CheckBox)
    Dim grdrow As GridViewRow = chk.Parent().Parent()

    Dim cellval As String = grdrow.Cells(2).Text

    If Session("is_first_checked") And chk.Checked Then
        Session("is_first_checked") = False
        lblresult.Text = "The text of the third cell in your first checked row is " + cellval
    End If

End Sub

Test Result:

With Regards,

Fei Han

Answer 5

User66371569 posted

Wow  It amazing   worked 100%     thank you so much