How to get checked value of dynamic checkbox inside gridview

Question

Hello everyone I've been browsing a net more time only to find the solution on my part..here's the problem.. I have created a dynamic checkbox inside also the dynamic gridview now the problem is that I can't get the value of checkbox when I attempt to save it in the database to update records on. here's my snippet: attached file for your reference

Kapildev Panchal · Answer

Hi guys I got the solution for it... please have a look at the below URL and modify your code accordingly. http://stackoverflow.com/questions/14752629/cannot-find-checkbox-control-added-on-rowdatabound-grid-view-even enjoy coding.. :) Regards Kapildev

mary jean ligas · Answer

Hi guys the solution was posted by sir Kapildev Panchal thank you so much big help on this

Kapildev Panchal · Answer

Hi Did you people got any solution for this? The CheckBox control added dynamically to GridView column and when it renders it's ID has some dynamic id prefixed to our defined id. So FindConrol method will never find the control and on top row.Cells[i].Controls[0] will always through exception rangeoutof... etc. Please let me know if you found the work around. Regards Kapildev

bhadri · Answer

Hi Mary Even I am also facing same issue Could you please let me know If you have any solution for this problem. I have been searching since 2 days I am not getting any solution. Here is my problem. I have Datagrid in asp.net page with the below mentioned data Device Name Column 1 Column 2 iPad Check Box Check Box iPhone Check Box Check Box iStore Check Box Check Box For Example: - Like this Here Check box is – Check Box Control on each Cell Here Device_NameColumn1 and Column2 are column names under these columns we have check boxes on both the columns Please can anybody help me how do I we get to know which all the check box's are TICKED. Once it has been TICKED I want to assign checked value (just to identify which are been ticked) to array list from Grid view (for storing purpose later I will pass this array list to next page). Could you please someone help me one this Please Note that: - while creating Gridview initially Check box will not be having any Id's because those check boxes are dynamically generated. This is my C# code for creating dynamic Check boxes in Gridview :- protected void GrdOSInfo_RowDataBound( object sender GridViewRowEventArgs e) { if (e.Row.RowType == DataControlRowType .DataRow) { for ( int i = 1; i { //foreach (GridView row in GridView1.Rows) //{ CheckBox chk = new CheckBox (); chk.EnableViewState = true ; chk.Enabled = true ; chk.ID = chkb +i; e.Row.Cells[i].Controls.Add(chk); //} } } } This is my asp.net code asp : GridView ID =GrdOSInfo runat =server CssClass =grid_table onrowdatabound =GrdOSInfo_RowDataBound BackColor =White Width =200px BorderColor =#999999 BorderStyle =None BorderWidth =1px CellPadding =3 GridLines =Vertical > FooterStyle BackColor =#CCCCCC ForeColor =Black /> HeaderStyle CssClass =grid_head_row Font-Bold =true ForeColor =White BackColor =#000084 /> PagerStyle CssClass =paging BackColor =#999999 ForeColor =Black HorizontalAlign =Center /> RowStyle CssClass =grid_even_row BackColor =#EEEEEE ForeColor =Black /> AlternatingRowStyle CssClass =grid_even_row BackColor =#DCDCDC /> SelectedRowStyle CssClass =grid_head_row BackColor =#008A8C Font-Bold =True ForeColor =White /> SortedAscendingCellStyle BackColor =#F1F1F1 /> SortedAscendingHeaderStyle BackColor =#0000A9 /> SortedDescendingCellStyle BackColor =#CAC9C9 /> SortedDescendingHeaderStyle BackColor =#000065 /> asp : GridView >

Ramasamy · Answer

Dear mary Do u get the solution for this problem? Since i m facing this if you got solution means send to me

mary jean ligas · Answer

still the value is null T_T

Iftikar Hussain · Answer

I think when you click on Save button the grid view is getting hide as by default you have set visible=false in your aspx code. You can do visible=true by default and in your code make it visible =false depend on the cndition Regards Iftikar

mary jean ligas · Answer

it is set as visible when I reset the dropdown selection into new..then visible once you have again selected in dropdown..please see attaché output

Iftikar Hussain · Answer

In what condition your gridRolApp will be visible. after that you see the view source and check weather your check box id is exist or not? Regards Iftikar

mary jean ligas · Answer

but I already declare the checkbox ID on my code huhuhu its so hard..but still I am hoping that someone could really help me alot..heres my code

Iftikar Hussain · Answer

I am not able to see ID you have mentioned for the checkbox. Regards Iftikar

mary jean ligas · Answer

Here's the viewsource of the page

Iftikar Hussain · Answer

can you check the view source of your page what is the id is getting generated for checkbox Regards Iftikar

mary jean ligas · Answer

I've Tested it but still getting null values please see attache

Iftikar Hussain · Answer

have you try my last logic. Regards Iftikar

mary jean ligas · Answer

Please see attaché error

Iftikar Hussain · Answer

since you are using master page content therefor you will be not able to get the id. You can try by setting id like this cb.ID = chkRole; CheckBox chk = new CheckBox(); if (row.Cells[i] != null) { chk = (CheckBox)row.Cells[i].FindControl(chkRole); if (chk!=null && chk.Checked) { } } Regards Iftikar

mary jean ligas · Answer

yes there is a cell value I=5 but still the value is null

mary jean ligas · Answer

still the findcontrol doesn't work cause null values always display

Iftikar Hussain · Answer

try like this CheckBox chk = new CheckBox(); if (row.Cells[i] != null) { chk = (CheckBox)row.Cells[i].FindControl(chkRole + id[0].Role_ShortName); if (chk!=null && chk.Checked) { } } and also put the break point and check weather there is cell or not Regards Iftikar

mary jean ligas · Answer

error: {System.NullReferenceException: Object reference not set to an instance of an object. at CLMS.EditUser.AllowSave() in D:\CLMS\Solution\07-08-2013-edit user with roles\CLMS\EditUser.aspx.cs:line 1244}

Iftikar Hussain · Answer

try like this CheckBox chk = new CheckBox(); chk = (CheckBox)row.Cells[i].FindControl(chkRole + id[0].Role_ShortName); Regards Iftikar

mary jean ligas · Answer

EditUser.Zip

mary jean ligas · Answer

My whole code is attached thanks

Iftikar Hussain · Answer

can you share your complete code? Regards Iftikar

mary jean ligas · Answer

heres the error Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index

Iftikar Hussain · Answer

can you share me the error and your code for saving? Regards Iftikar

mary jean ligas · Answer

still in error

Iftikar Hussain · Answer

it will work. inside button click event you can loop thru all grid view rows and check the value you need to provide the cell number protected void Button1_Click(object sender EventArgs e) { foreach (GridViewRow row in GridView1.Rows) { CheckBox chk = (CheckBox) gridRolApp.Rows.Cells[0].FindControl(chkRole+id[0].Role_ShortName; if (chk != null && chk.Checked) { // ...do your code } } } Regards Iftikar

mary jean ligas · Answer

not working but thanks

mary jean ligas · Answer

one save button to click dynamically created checkbox inside gridview but findcontrol does not work..

Iftikar Hussain · Answer

try like this CheckBox chk = (CheckBox) gridRolApp.Rows.Cells[0].FindControl(chkRole+id[0].Role_ShortName); if (chk.Checked) { //Do stuff here } Regards Iftikar

Iftikar Hussain · Answer

you are trying to click save button for each grid row or one save button to save all checked check boxes? Regards Iftikar

mary jean ligas · Answer

I attached the file please help me to check thanks in advance

Iftikar Hussain · Answer

Hi Your attachment is missing. Regards Iftikar