Add checkbox with CheckedChanged Event to a Dynamic GridView

Question

I want to dynamically add a checkbox to a dynamic GridView along with an Event.

i.e. For the grid I have to add check boxes dynamically checked or unchecked according to the Database. And by clicking the checkbox itself I want to update the database.

For this I need the Event to also be dynamically loaded along with the checkbox.

What I have completed is a static version and is exhibited here:

In database RoleID(Admin,Purchase Officer etc), ActivityID(Leave application etc) and OperationID(Save,Edit Etc) are stored.

First row implies for Admin(roleid 1) Save operation(OperationID 1) is allowed for activity Leave application(Activityid 3).

Krishna Thota · Accepted Answer · 2012-03-02 06:53:43Z

7

I'm sorry, follow this

Place a check box in gridview

this is an example HTML Code to declare a checkbox in gridview

               <asp:TemplateField HeaderText="chkbox">
                   <ItemTemplate>
                       <asp:CheckBox ID="CheckBox1" runat="server"  AutoPostBack="true"
                           oncheckedchanged="CheckBox1_CheckedChanged"  />
                   </ItemTemplate>
               </asp:TemplateField>

Now about the event for the checkbox

protected void CheckBox1_CheckedChanged(object sender, EventArgs e)
{
   GridViewRow row = ((GridViewRow)((CheckBox)sender).NamingContainer);
    int index = row.RowIndex;
    CheckBox cb1 = (CheckBox)Gridview.Rows[index].FindControl("CheckBox1");
    string checkboxstatus;
    if (cb1.Checked == true)
        checkboxstatus = "YES";
    else if(cb1.Checked == false)
        checkboxstatus = "NO";

    //Here Write the code to connect to your database and update the status by 
    //sending the checkboxstatus as variable and update in the database.
}

edited Mar 2, 2012 at 6:53

answered Mar 2, 2012 at 4:45

Krishna Thota

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2 Comments

Anish Karunakaran Over a year ago

can you please make it little more specific.. ie am adding checkboxes at runtime..is it possible to add an event elong with it.. ie Checkedchanged event .. or such ones like cellMouseClick event of windows..

Anish Karunakaran Over a year ago

Senior I managed it.. I just embedded the event Selected IdexChanged in PreRender event... But The dynamically added CheckedChanged Event is not fired and even after clicking the checkbox its state is not changing...

Sinan AKYAZICI · Accepted Answer · 2012-03-02 07:22:49Z

4

if you are adding checkboxes at runtime, when you add checkbox, the checkbox event needs to be defined.

For example :

    TableCell tcCheckCell = new TableCell();
    var checkBox = new CheckBox();
    checkBox.CheckedChanged += checkBox_CheckedChanged;
    tcCheckCell.Controls.Add(checkBox);
    gridView.Rows[0].Cells.AddAt(0, tcCheckCell);

    void checkBox_CheckedChanged(object sender, EventArgs e)
    {
        //do something: You can use Krishna Thota's Code.
    }

answered Mar 2, 2012 at 7:22

Sinan AKYAZICI

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7 Comments

Anish Karunakaran Over a year ago

Senior.. it Was an Excellent Solution.. Thank U Very much For your Precious Moments..

Anish Karunakaran Over a year ago

Hai senior... I met with another problem with the way you suggested.. i jst tried with setting autopostback= true for check box.. bt i ddin't worked. the event is not firing and check boxes get cleared when clicked.. What to do.. Pls Help me.. its very Urgent..

Sinan AKYAZICI Over a year ago

You need to do in OnPreRender. protected override void OnPreRender(EventArgs e){ //your code }

Anish Karunakaran Over a year ago

Thank U sir.. I have a Problem That ma Entire code is in the SelectedIndexChanged Event of the Dropdown list.. and i havn't handled the event you Specified.. Sir So can u please tell me how can i handle this Condition.. Pls Help Me.. i wil be Very glad with ur answer.. Thank You..

Anish Karunakaran Over a year ago

Senior I managed it.. I just embedded the event Selected IdexChanged in PreRender event... But The dynamically added CheckedChanged Event is not fired and even after clicking the checkbox its state is not changing...

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