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How to use Ajax Calendar in Grid View to disable past date

I use a CalendarExtender of AjaxControlToolkit in a GridView and a TextBox. And from that TextBox I want to disable future dates.
I am trying below code
<asp:GridView ID="Gridview2" runat="server" AutoGenerateColumns="false" DataKeyNames="Sno" ShowFooter="true" OnRowCommand="Gridview2_RowCommand" CssClass="table table-bordered table-striped"
OnRowCancelingEdit="Gridview2_RowCancelingEdit" OnRowDeleting="Gridview2_RowDeleting" OnRowEditing="Gridview2_RowEditing" OnRowUpdating="Gridview2_RowUpdating" OnRowDataBound="Gridview2_RowDataBound">
<Columns>
<asp:TemplateField HeaderText="Sno" Visible="false">
<ItemTemplate>
<asp:Label ID="lbl_sno1" runat="server" Text='<%#Eval("Sno") %>' />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Date of visit" ShowHeader="false">
<EditItemTemplate>
<asp:TextBox ID="Txt_update_DateofVisit1" runat="server" Text='<%# Eval("DateofVisit","{0:MM/dd/yyyy}") %>' CssClass="form-control"/>
<cc1:CalendarExtender ID="CalendarExtenderedit11" CssClass="Calendar" TargetControlID="Txt_update_DateofVisit1" Format="MM/dd/yyyy" runat="server"></cc1:CalendarExtender>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="lbl_DateofVisit1" runat="server" Text='<%# Eval("DateofVisit","{0:MM/dd/yyyy}") %>' />
</ItemTemplate>
<FooterTemplate>
<asp:TextBox ID="txt_DateofVisit_add" runat="server" CssClass="form-control" />
<cc1:CalendarExtender ID="CalendarExtendere21" CssClass="Calendar" TargetControlID="txt_DateofVisit_add" Format="MM/dd/yyyy" runat="server"></cc1:CalendarExtender>
</FooterTemplate>
</asp:TemplateField>
<asp:TemplateField>
<ItemTemplate>
<asp:ImageButton ID="imgbtnDelete_add" runat="server" CommandName="Delete" ImageUrl="~/img/grid_delete.png" Text="Edit" ToolTip="click here to delete" />
</ItemTemplate>
<FooterTemplate>
<asp:ImageButton ID="imgbtnAdd_add" runat="server" CommandName="AddNew" ImageUrl="~/img/grid_add.png" ToolTip="click here to add" CausesValidation="true" ValidationGroup="outadd" />
</FooterTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
Below is my RowDataBound
protected void Gridview2_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
AjaxControlToolkit.CalendarExtender CalendarExtendere21 = (AjaxControlToolkit.CalendarExtender)Gridview2.FooterRow.FindControl("CalendarExtendere21");
CalendarExtendere21.EndDate = DateTime.Now;
// CalendarExtendere21.StartDate = DateTime.Now;
}
}
I get below error:
Object reference not set to an instance of an object.

just use parameter e to find out control in grid
if (e.Row.RowType == DataControlRowType.Footer)
{
AjaxControlToolkit.CalendarExtender CalendarExtendere21 =
(e.Row.FindControl("CalendarExtendere21") as AjaxControlToolkit.CalendarExtender);
}
and don't forget to check for null

How to fill data in some of GridViewRow and leave some blank

ASP.net C#
I am creating a gridview having 5 rows containing detail of operations users have to perform. Detail of operations should be filled when it is completed. At a time any number of operation details can be filled.
In gridview, first Item-template contains Label (for operation name) and others are textbox (for other details).
If any user has filled 3 rows then rest of two rows should be blank.
My problem is how to bind those 3 rows filled previously leaving two bottom rows available for entry.
My Gridview design is :
<asp:GridView CssClass="table-bordered gridStyle" runat="server" ShowFooter="True"
ID="grdOperationEntry" GridLines="None" AutoGenerateColumns="False">
<Columns>
<asp:TemplateField HeaderText="Operation">
<ItemTemplate>
<asp:Label Text='<%# Eval("operation_title") %>' ID="lblOperationName" runat="server" />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Date of Completion">
<ItemTemplate>
<asp:TextBox runat="server" Text='<%# Eval("date_completed") %>' CssClass="form-control"
ID="txtDateCompletion" />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Time Taken">
<ItemTemplate>
<asp:TextBox runat="server" Text='<%# Eval("time_taken") %>' ID="txtTimeTaken" CssClass="form-control" />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Score">
<ItemTemplate>
<asp:TextBox runat="server" Text='<%# Eval("score_gain") %>' ID="txtScore" CssClass="form-control" />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Reported To">
<ItemTemplate>
<asp:TextBox runat="server" Text='<%# Eval("reported_to") %>' ID="txtReportedTo"
CssClass="form-control" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
<AlternatingRowStyle BackColor="White" />
<EditRowStyle BackColor="#7C6F57" />
</asp:GridView>

Add a Label with all TextBoxes in GridView and set them visible false and bind also Label from database. I have added an example TemplateField to below, you can do it for all other:
.....
<asp:TemplateField HeaderText="Date of Completion">
<ItemTemplate>
<asp:Label runat="server" Visible="False" Text='<%# Eval("date_completed")
ID="lblDateCompletion" %>'></asp:Label>
<asp:TextBox runat="server" Visible="False" Text='<%# Eval("date_completed") %>'
ID="txtDateCompletion" />
</ItemTemplate>
</asp:TemplateField>
.....
In RowDataBound event set them visible true:
protected void grdOperationEntry_RowDataBound(object sender, GridViewRowEventArgs e)
{
// check if gridview row not a header or footer
if (e.Row.RowType == DataControlRowType.DataRow)
{
// get controls by id from gridview and cast them
Label lblDateCompletion = e.Row.FindControl("lblDateCompletion") as Label;
TextBox txtDateCompletion = e.Row.FindControl("txtDateCompletion") as TextBox;
if (lblDateCompletion.Text == null)
txtDateCompletion.Visible = true;
else
lblDateCompletion.Visible = true;
// perform same for other controls
}
}
Note: Don't forget to add OnRowDataBound property to your GridView <asp:GridView ID="grdOperationEntry" runat="server" OnRowDataBound="grdOperationEntry_RowDataBound" >

Remove Hyperlink of specif cell in gridview

I've created a gridview, which all values (footer included) are hyperlinks, to export a detail in Excel.
All is working fine, except, when the value is 0, I don't want to permit the hyperlink, so it doesn't create a empty excel.
<asp:GridView ID="dtlist" runat="server" CellPadding="0" CssClass="table tabela caixa " CellSpacing="0" OnRowDataBound="dtlist_RowDataBound" AutoGenerateColumns="false" GridLines="Vertical" BorderStyle="Solid" ShowFooter="true" >
<Columns >
<asp:TemplateField HeaderText="Name">
<ItemTemplate>
<asp:Label ID="Label2" runat="server" Text='<%# Eval("name") %>'></asp:Label>
</ItemTemplate>
<FooterTemplate>
<asp:Label ID="LabelT" runat="server" Text="Total"></asp:Label>
</FooterTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Value">
<ItemTemplate>
<asp:HyperLink runat="server" ID="lnkA" NavigateUrl='<%# String.Format("/Export?name={0}, Eval("name")) %>' Text='<%# Eval("value","{0:#####,##0.00 €}") %>' />
<asp:Label runat="server" ID="lblA" Text='<%# Eval("value","{0:#####,##0.00 €}") %>' Visible="false" />
</ItemTemplate>
<ItemStyle CssClass="alinha-direita" />
<FooterTemplate>
<asp:HyperLink runat="server" ID="lnkTA" />
</FooterTemplate>
<FooterStyle CssClass="alinha-direita" />
<HeaderStyle CssClass="alinha-meio" />
</asp:TemplateField>
</Columns>
</asp:GridView>
This is the RowDataBound:
protected void dtlist_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.Header)
{
Total = 0;
}
if (e.Row.RowType == DataControlRowType.DataRow)
{
HyperLink hA = (HyperLink)e.Row.FindControl("lnkA");
Label lA = (Label)e.Row.FindControl("lblA");
if (hA.Text.ToDecimal() == 0)
{
hA.Visible = false;
lA.Visible = true;
}
Total += ((DataRowView)e.Row.DataItem).Row["Ano0"].ToDecimal();
}
if (e.Row.RowType == DataControlRowType.Footer)
{
HyperLink tA = (HyperLink)e.Row.FindControl("lnkTA");
tA.NavigateUrl = String.Format("/ExportStock?name={0}","ZZZZ");
tA.Text = Total0.StringEuro();
}
}
I've tried to ask on the e.Row.RowType == DataControlRowType.DataRow, if the value of the Hyperlink is 0, but if one value on the column is 0 it disables all hyperlinks on that column.
How can I remove only for the 0 cell?
Thanks.
CODE UPDATED

How to bind hovermenuextender control to a row with multiple columns in a dynamic gridview?

I wish to attach a hovermenu pop up to rows of a gridview which is dynamically populated from a datasource. I tried to set TargetcontrolId property of hovermenuextender control to row unique Id on occurence of rowdatabound event. But rather than appearing on the right side of each row, pop up is appearing on the right side of header row. Can somebody help me resolve this problem? I used below code for the same
CodeBehind:
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
try
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
HoverMenuExtender hoverMenu =(HoverMenuExtender)e.Row.FindControl("hme2");
if (hoverMenu != null)
{
hoverMenu.TargetControlID = hoverMenu.Parent.Parent.UniqueID;
}
}
}
}
Aspx page:
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" BackColor="White" ShowFooter="false" ShowHeader="false"
OnRowEditing="GridView1_RowEditing" OnRowCommand="GridView1_RowCommand" OnRowUpdating="GridView1_RowUpdating"
GridLines="None" OnRowDataBound="GridView1_RowDataBound">
<AlternatingRowStyle BackColor="White" />
<Columns>
<asp:TemplateField HeaderText ="Talk Title">
<ItemTemplate>
<asp:Label Font-Bold="true" ID="lbltalktitle" runat="server" Text='<%#Eval("Talk_Title") %>' />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText ="Brand">
<ItemTemplate>
<asp:Label ID="lblBrand" runat="server" Text='<%# Eval("Brand") %>' /></td>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText ="Franchise">
<ItemTemplate>
<asp:Label ID="lblFranchise" runat="server" Text='<%# Eval("Franchise") %>' />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText ="programmetype">
<ItemTemplate>
<asp:Label ID="lblprg" runat="server" Text='<%# Eval("programmetype") %>' />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText ="programmetype">
<ItemTemplate>
<asp:Label ID="lblsaledforce" runat="server" Text='<%# Eval("salesforce") %>' />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText ="Start_Date">
<ItemTemplate>
<asp:Label ID="lblstartdate" runat="server" Text='<%# Eval("Start_Date") %>' />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText ="End_Date">
<ItemTemplate>
<asp:Label ID="lblenddate" runat="server" Text='<%# Eval("End_Date") %>' />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField>
<ItemTemplate>
<cc1:HoverMenuExtender ID="hme2" runat="server" TargetControlID="lblenddate"
PopupControlID="PopupMenuX" HoverCssClass="popupHover" PopupPosition="Right"/>
<asp:Panel CssClass="popupMenu" ID="PopupMenuX" runat="server">
<asp:LinkButton ID="LinkButton1" runat="server" CommandName="Edit" Text="Edit" /><br />
<asp:LinkButton ID="LinkButton2" runat="server" CommandName="Delete" Text="Delete" />
</asp:Panel>
</ItemTemplate>
</asp:TemplateField>
</Columns>
<FooterStyle BackColor="#C6C3C6" ForeColor="Black" />
<HeaderStyle BackColor="#4A3C8C" Font-Bold="True" ForeColor="#E7E7FF" />
<PagerStyle BackColor="#C6C3C6" ForeColor="Black" HorizontalAlign="Right" />
<RowStyle ForeColor="Black" />
<SortedAscendingCellStyle BackColor="#F1F1F1" />
<SortedAscendingHeaderStyle BackColor="#594B9C" />
<SortedDescendingCellStyle BackColor="#CAC9C9" />
<SortedDescendingHeaderStyle BackColor="#33276A" />
</asp:GridView>

protected void gv_RowCreated(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
AjaxControlToolkit.HoverMenuExtender ajxhovermenu = (AjaxControlToolkit.HoverMenuExtender)e.Row.FindControl("ahm_1");
e.Row.ID = e.Row.RowIndex.ToString();
ajxhovermenu.TargetControlID = e.Row.ID;
}
}
Give TargetControlID of the HoverMenuExtender in RowCreated event of GridView and set it as the RowID

Nested grid edit doesn't work

I'm stuck on this problem where I have grid within grid where the nested grid is editable. I can't get the edit working. What's complicates things is that the nested grid is inside a modal popup extender.
It works to the point where I click on the edit button. Then the EmptyDataText property kicks in with the message. If I click on it second time the grid opens in edit mode but the update/cancel buttons don't work. The cancel button when click displays the EmptyDataText property.
Another issue is that this nested grid doesn't use a object data source so I'm going to have to all the updating and deleting in the code file. Not sure now to do that either.
I would like some advice as to how to make this corrected. Here is the code:
<asp:GridView ID="gvForum" runat="server" DataSourceID="odsForumApproval" DataKeyNames="id" Width="200px"
RepeatColumns="1" DataKeyField="id" CssClass="gridview"
AutoGenerateColumns="False" GridLines="None" OnSelectedIndexChanged="_OnCommand">
<AlternatingRowStyle CssClass="altbgcolor" />
<Columns>
<asp:TemplateField >
<ItemTemplate>
<asp:Label runat="server" ID="lblTitle" Text='<%# Bind("Title") %>' />
<asp:Panel id="div" runat="server" align="center" class="confirm" style="display:none" >
<asp:GridView runat="server" ID="gvForumDetail" AutoGenerateColumns="False" DataKeyNames="id"
AllowPaging='true' CssClass="gridview"
AllowSorting="true" PageSize="5" CellPadding="5" OnRowEditing="gvForumDetail_OnRowEditing"
OnRowCancelingEdit="gvForumDetail_CancelRecord" >
<AlternatingRowStyle CssClass="altbgcolor" />
<RowStyle VerticalAlign="Top" HorizontalAlign="Left" />
<HeaderStyle CssClass="greenbar" ForeColor="White" /> <Columns>
<asp:BoundField DataField="id" ReadOnly="true" Visible="false" />
<asp:TemplateField HeaderText="Title">
<ItemTemplate>
<asp:Label runat="server" ID="lblTraining" Text='<%# Bind("title") %>' />
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox runat="server" ID="txtTraining" Text='<%# Bind("title") %>' />
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Post Message">
<ItemTemplate>
<asp:Label runat="server" ID="lblCompletionDate" Width="250" Text='<%# Bind("description") %>' />
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox runat="server" ID="txtDescription" Text='<%# Bind("description") %>' TextMode="MultiLine" Rows="5" Width="250" />
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Posted By">
<ItemTemplate>
<asp:Label runat="server" ID="lblRecurence" Text='<%# Bind("MemberName") %>' />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Posted Date">
<ItemTemplate>
<asp:Label runat="server" ID="lblNotes" Text='<%# Eval("itemdate", "{0:d}") %>' />
</ItemTemplate>
<EditItemTemplate>
<asp:CheckBox runat="server" ID="cbxApproved" Text='<%# Bind("approved") %>' />
</EditItemTemplate>
</asp:TemplateField>
<asp:CommandField ShowCancelButton="true" ShowEditButton="true" ShowDeleteButton="true" />
</Columns>
</asp:GridView>
<br />
<Club:RolloverLink ID="btnClose" runat="server" Text="Close" />
</asp:Panel>
<ajaxToolKit:ModalPopupExtender ID="ModalPopupExtender1" runat="server"
TargetControlID="lblTitle"
PopupControlID="div"
CancelControlID="btnClose"
BackgroundCssClass="modalBackground" />
</ItemTemplate>
</asp:TemplateField>
<asp:CommandField ShowSelectButton="True" />
</Columns>
Code behind:
public void _OnCommand(object sender, EventArgs e)
{
ObjectDataSource ods = new ObjectDataSource();
ods.ID = "ods_ForumDetail";
ods.EnableViewState = true;
ods.TypeName = "ForumApproval";
ods.SelectMethod = "GetForumById";
string id = "";
int rowIndex = gvForum.SelectedIndex;
id = gvForum.DataKeys[rowIndex].Value.ToString();
ods.SelectParameters.Add("id", System.TypeCode.Int32, id);
var ModalPopupExtender1 = (ModalPopupExtender)(gvForum.SelectedRow.FindControl("ModalPopupExtender1"));
ModalPopupExtender1.Show();
var gvForumDetail = (GridView)(gvForum.SelectedRow.FindControl("gvForumDetail"));
gvForumDetail.DataSource = ods;
gvForumDetail.DataBind();
}
protected void gvForumDetail_OnRowEditing(Object sender, GridViewEditEventArgs e)
{
var ModalPopupExtender1 = (ModalPopupExtender)(gvForum.SelectedRow.FindControl("ModalPopupExtender1"));
ModalPopupExtender1.Show();
var gvForumDetail = (GridView)(gvForum.SelectedRow.FindControl("gvForumDetail"));
gvForumDetail.EditIndex = e.NewEditIndex;
gvForumDetail.DataBind();
}
protected void gvForumDetail_CancelRecord(object sender, GridViewCancelEditEventArgs e)
{
var ModalPopupExtender1 = (ModalPopupExtender)(gvForum.SelectedRow.FindControl("ModalPopupExtender1"));
ModalPopupExtender1.Show();
var gvForumDetail = (GridView)(gvForum.SelectedRow.FindControl("gvForumDetail"));
gvForumDetail.EditIndex = -1;
gvForumDetail.DataBind();
}

I will try to answer part of your question, updating and deleting the code. you need to take advantage of the "onrowcommand" for the inner gridview (OnRowCommand).