Enable checkbox when user clicks on Edit button (GridView)

Chriz L

9y1.4kVisual Basic .NET

Hello,

I have the following code:

protected void gv_RowEditing(object sender, GridViewEditEventArgs e)
{
gv.EditIndex = e.NewEditIndex;
ImageButton lnkRowSelection = (ImageButton)sender;
String result = lnkRowSelection.CommandArgument.ToString();
if(result=="N/A")
//cbResultManualΝο on gridView must be set to enable.
// cbResultManualYes on gridView must be set to enable.
bindGrid();
}

<asp:GridView ID="gv" runat="server" AutoGenerateColumns="false"
OnRowCancelingEdit="gv_RowCancelingEdit"
OnRowEditing="gv_RowEditing"
OnRowUpdating="gv_RowUpdating" CssClass="mTable">
<Columns>
<asp:TemplateField HeaderText="Check" ItemStyle-Width="25">
<ItemTemplate>
<asp:Label ID="lblResultAuto" runat="server" Text='<%#Eval("CheckRes") %>' Width="25">asp:Label>
ItemTemplate>
asp:TemplateField>
<asp:TemplateField HeaderText="Valid" ItemStyle-Width="25">
<ItemTemplate>
<asp:CheckBox ID="lblResultManual" runat="server" Enabled="False" />
ItemTemplate>
<EditItemTemplate>
<asp:CheckBox ID="cbResultManualYes" runat="server" Enabled="false"/>
EditItemTemplate>
asp:TemplateField>
<asp:TemplateField HeaderText="Not Valid" ItemStyle-Width="25">
<ItemTemplate>
<asp:CheckBox ID="lblResultManual1" runat="server" Enabled="False" />
ItemTemplate>
<EditItemTemplate>
<asp:CheckBox ID="cbResultManualΝο" runat="server" Enabled="false"/>
EditItemTemplate>
asp:TemplateField>
<asp:TemplateField >
<ItemTemplate>
<asp:LinkButton ID="btnEdit" Text="Edit" runat="server" CommandName="Edit" />
ItemTemplate>
<EditItemTemplate>
<asp:LinkButton ID="btnUpdate" Text="Update" runat="server" CommandName="Update" />
<asp:LinkButton ID="btnCancel" Text="Cancel" runat="server" CommandName="Cancel" />
EditItemTemplate>
asp:TemplateField>
Columns>
asp:GridView>

How can I enable cbResultManualΝο and cbResultManualΝο when the user clicks on Edit?

5 Replies

Know the answer? Post it — somebody with the same question will find it here.

Midhun Tp9y ago
Accepted answer
Hi,

Try below code -
protected void gv_RowEditing(object sender, GridViewEditEventArgs e)
{
    gv.EditIndex = e.NewEditIndex;
    ImageButton lnkRowSelection = (ImageButton)sender;
    String result = lnkRowSelection.CommandArgument.ToString();
    bindGrid();
    if (result == "N/A")
    {
        int index = Convert.ToInt32(e.NewEditIndex);
        CheckBox cb = (CheckBox)grdviewnew.Rows[index].FindControl("cbResultManualΝο");
        cb.Enabled = true;
        cb = (CheckBox)grdviewnew.Rows[index].FindControl("cbResultManualYes");
        cb.Enabled = true;
    }
}
0
Chriz L9y ago
Thank you for all the help!
0
Midhun Tp9y ago
Hi,

Try below code inside rowdatabound-
protected void gv_RowDataBound(object sender, GridViewRowEventArgs e)
{
    try
    {
        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            if (grdviewnew.EditIndex == (e.Row.DataItemIndex))
            {
                CheckBox cb = (CheckBox)e.Row.FindControl("cbResultManualΝο");
                cb.Enabled = true;
                cb = (CheckBox)e.Row.FindControl("cbResultManualYes");
                cb.Enabled = true;
            }
        }
    }
    catch (Exception ex)
    {
    }
}
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Chriz L9y ago
I already did that but I still get the same error message.

I also tried the following but I get the same error on chkboxYes.Enabled = true; as well :
protected void gv_RowDataBound(object sender, GridViewRowEventArgs e)
        {
            if (e.Row.RowType == DataControlRowType.DataRow)
            {
                Label result = e.Row.FindControl("lblResultAuto") as Label;

                CheckBox chkboxYes = (CheckBox)e.Row.FindControl("cbResultManualYes");
                CheckBox chkboxNo = (CheckBox)e.Row.FindControl("cbResultManualΝο");

                if (result.Text == "N/A")
                {
                    chkboxYes.Enabled = true;
                    chkboxNo.Enabled = true;
                }
            }
        }
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Chriz L9y ago
Thank you for your answer!

I get the following error on cb.Enabled=true;

"Object reference not set to an instance of an object."
0