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ASP.NET Using JQuery with nested, editable GridViews with expand/colapse features

One part of my application uses nested GridViews in order to display data. I have clients' orders, and each order consists of 1-or-more products. Now, in order to present data to the user, I used the order data GridView with a button in each row, which allows you to expand/collapse the child Gridview.
When designing this I followed the tutorial presented on this page:
https://www.aspsnippets.com/Articles/ASPNet-Nested-GridViews-GridView-inside-GridView-with-Expand-and-Collapse-feature.aspx
with some modifications, since my situation is a little bit different (E.g. I don't use a database since data is imported from the external API).
However, the problem is that in the original code the child GridView data is only displayed, while in my solution it has some DropDownLists that allows user to edit the data:
<asp:GridView ID="MainTable" runat="server" OnDataBound="MainTable_DataBound" AutoGenerateColumns="false" OnRowCommand="MainTable_RowCommand" class="w3-table w3-centered">
<HeaderStyle CssClass="w3-blue" />
<Columns>
<asp:TemplateField>
<ItemTemplate>
<a class="w3-btn w3-blue button" id="plus">+</a>
<asp:Panel ID="pnlOrders" runat="server" Style="display: none">
<asp:GridView ID="ProductsTable" runat="server" OnRowDataBound="ProductsTable_RowDataBound" AutoGenerateColumns="false" class="w3-table w3-striped">
<Columns>
<asp:BoundField DataField="Name" HeaderText="Nazwa" />
<asp:BoundField DataField="Indexer" Visible="false" />
<asp:TemplateField HeaderText="Parametr 1">
<ItemTemplate>
<asp:DropDownList ID="DropDownList1" runat="server" class="w3-select w3-border"></asp:DropDownList>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Parametr 2">
<ItemTemplate>
<asp:DropDownList ID="DropDownList2" runat="server" class="w3-select w3-border"></asp:DropDownList>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Parametr 3">
<ItemTemplate>
<asp:DropDownList ID="DropDownList3" runat="server" class="w3-select w3-border"></asp:DropDownList>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Usuń">
<ItemTemplate>
<a class="w3-btn w3-blue verify">V</a>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
</asp:Panel>
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="ID" HeaderText="ID" />
<asp:BoundField DataField="Client" HeaderText="Klient" />
<asp:BoundField DataField="Phone" HeaderText="Telefon" />
<asp:BoundField DataField="Comment" HeaderText="Komentarz" />
<asp:TemplateField HeaderText="Zatwierdź">
<ItemTemplate>
<asp:Button class="w3-btn w3-blue" Text="Zatwierdź" runat="server" CommandName="Verify" CommandArgument="<%# Container.DataItemIndex %>" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
Now, the JQuery used in the original code creates a copy of child GridView, which is removed when the user clicks the "-" button. Because of that, I can't access DropDownLists in the code and the changes made by user are not saved. I also found out that the buttons in the child GridView (class .verify) aren't working properly (This, however, might be my fault since I'm not really fluent in JQuery).
$(document).ready(function () {
$(".button").on("click", function () {
if ($(this).attr('id') == "plus") {
$(this).closest("tr").after("<tr><td></td><td colspan = '999'>" + $(this).next().html() + "</td></tr>");
$(this).html("-");
$(this).attr('id', 'minus');
}
else {
$(this).html("+");
$(this).closest("tr").next().remove();
$(this).attr('id', 'plus');
}
});
$(".verify").on("click", function () {
$(this).closest("tr").css("background-color", "#ffffff");
});
});
So my question is - how to maintain the current look and page design of the application (opening child GridView outside of the cell), while still being able to access DropDownLists in the code behind? is it possible to do it with JQuery? If not, do you have any other ideas on how to resolve this?
[EDIT] Here are some pics of how it looks:

You can also use hide() instead of remove(). Like so:
$(this).html("+");
$(this).closest("tr").next().hide();
$(this).attr('id', 'plus');

Selection of checkboxes lost during pagination of gridview

I have a problem in gridview, as per requirement i have set No of Records per page = 4 in gridview. I have to select Checkbox against every complaint but problem is then when i got to next pge in gridview and e.g fro 1 to 2 then when i come back to page 1 then it doesn't show TICK in check boxes . It doesn't remember my selection when i browse to and back to page.
<asp:GridView ID="GridViewSmsComplaints" AllowPaging="True" PageSize="4" runat="server" AutoGenerateColumns="False" CssClass="mGrid" BorderColor="#333333" Width="550px" OnPageIndexChanging="GridViewSmsComplaints_PageIndexChanging" >
<Columns>
<asp:BoundField HeaderText="ID" DataField="ID" />
<asp:BoundField HeaderText="Recieving Date" DataField="RecievingDate" />
<%--<asp:BoundField HeaderText="ToMobileNo" DataField="ToMobileNo" /> --%>
<asp:BoundField HeaderText="FromMobileNo" DataField="FromMobileNo" />
<asp:BoundField HeaderText="Message" DataField="Message" >
<ItemStyle Wrap="True" />
</asp:BoundField>
<asp:TemplateField HeaderText="IsComplaint">
<ItemTemplate>
<asp:CheckBox ID="ckboxIsComplaint" runat="server" Checked='<%# Convert.ToBoolean(Eval("IsComplaint").ToString()) %>' />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>

please check the above link.here your problem was clearly explained here.i think so it may be helpfull

As per comments...
If you do not update the underlying database by processing the OnCheckChanged event of the check box, then it will simply be reading the same data all the time.
From How to add event for Checkbox click in Asp.net Gridview Column, I have extracted the required information and tried to modify to fit your initial question.
<asp:TemplateField HeaderText="IsComplaint">
<ItemTemplate>
<asp:CheckBox ID="ckboxIsComplaint" runat="server" Checked='<%# Convert.ToBoolean(Eval("IsComplaint").ToString()) %>' OnCheckedChanged="chk_CheckedChanged" AutoPostBack="true/>
</ItemTemplate>
</asp:TemplateField>
add checkbox change event in aspx.cs page
protected void chk_CheckedChanged(object sender, EventArgs e)
{
GridViewRow row = ((GridViewRow)((CheckBox)sender).NamingContainer);
<your data source>.Rows[row.DataItemIndex]["B"] = ((CheckBox)GridViewSmsComplaints.Rows[row.RowIndex].FindControl("ckboxIsComplaint")).Checked;
}

How to filter Gridview columns on the basis of column type

How to filter Gridview columns on the basis of column type(i.e. Bound field , template field etc...)
Suppose i have a gridview with following code
<asp:gridview id="CustomersGridView"
datasourceid="CustomersSource"
autogeneratecolumns="true"
emptydatatext="No data available."
runat="server">
<columns>
<asp:boundfield datafield="CustomerID" headertext="Customer ID"/>
<asp:boundfield datafield="CompanyName" headertext="Company Name"/>
<asp:boundfield datafield="Address" headertext="Address"/>
<asp:boundfield datafield="City" headertext="City"/>
<asp:boundfield datafield="PostalCode" headertext="Postal Code"/>
<asp:boundfield datafield="Country" headertext="Country"/>
<asp:templatefield headertext="Author Name">
<itemtemplate>
<asp:label id="FirstNameLabel"
Text= '<%# Eval("au_fname") %>'
runat="server"/>
<asp:label id="LastNameLabel"
Text= '<%# Eval("au_lname") %>'
runat="server"/>
</itemtemplate>
</asp:templatefield>
<asp:hyperlinkfield text="Details..."
navigateurl="~\details.aspx"
headertext="Order Details"
target="_blank" />
</columns>
</asp:gridview>
Now i want to run through all the boundfields only (so last 2 columns should be filtered out).
I know it can be done by going through all the columns of a gridview and checking column type(with grdView.Columns[ct].GetType().Name;) but in my actual scenario it may be having 25 - 30 columns so dnt want to run through all columns but want to filter out only boundfileds first and then run through them
I dont want run a loop through all the available columns ..

Well, to filter columns, you have to look at each of them to check whether the column satisfies your condition. So you have to loop over all of them in any case, it can be explicit, or implicit, but it is there.
You can use Linq for something like that,
var filtered = CustomerGridView.Columns.Where(
column => column.GetType().Name == "Some column type" );
It returns an IEnumerable (actually, a lazy generator behind the scenes), which only gets evaluated when you actually iterate over it.

How to fix the width for each column in GridView?

How can I fix the width for each column in GridView. My GridView keeps extend along with data in the cell. I need it to skip to new line when it reach the right side of the cell. This is my code in .aspx file:
<asp:GridView ID="GridView1" runat="server"
AutoGenerateColumns="False" DataKeyNames="Emp_ID" DataSourceID="LinqDataSource1"
AllowPaging="True" AllowSorting="True" Width="900px" HorizontalAlign="Center" >
<Columns>
<asp:BoundField DataField="Emp_ID" HeaderText="ID"
InsertVisible="False" ReadOnly="True" SortExpression="Emp_ID"/>
<asp:BoundField DataField="Emp_Username"
HeaderText="Username" SortExpression="Emp_Username" />
<asp:BoundField DataField="Emp_Password"
HeaderText="Password" SortExpression="Emp_Password" />
<asp:BoundField DataField="Emp_Name"
HeaderText="ชื่อพนักงาน" SortExpression="Emp_Name" />
<asp:BoundField DataField="Emp_Address"
HeaderText="ที่อยู่" SortExpression="Emp_Address" />
<asp:BoundField DataField="Emp_Tel"
HeaderText="เบอร์โทรศัพท์" SortExpression="Emp_Tel" />
<asp:TemplateField HeaderText="รูปพนักงาน" SortExpression="Emp_Picture">
<EditItemTemplate>
<asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("Emp_Picture") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Image ID="Image2" runat="server" Height="70px"
ImageUrl='<%# Eval("Emp_Picture", "{0}") %>' Width="50px" />
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="Status" HeaderText="สถานะ"
SortExpression="Status" />
<asp:HyperLinkField DataNavigateUrlFields="Emp_ID"
DataNavigateUrlFormatString="AdminUpdate.aspx?Emp_ID={0}" Text="Edit" />
<asp:TemplateField>
<HeaderTemplate>
<asp:CheckBox ID="ChkSelectAll" runat="server"
AutoPostBack="True" oncheckedchanged="ChkSelectAll_CheckedChanged" />
</HeaderTemplate>
<ItemTemplate>
<asp:CheckBox ID="Chk" runat="server" AutoPostBack="True" oncheckedchanged="Chk_CheckedChanged" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
Here's my design view:
As you can see, the first 4 columns has no problem with that until column 5. It keeps extend cause all GridView extend out of the page

Set itemstyle width of every column.For example.
<asp:BoundField DataField="Emp_Address"
HeaderText="ที่อยู่" SortExpression="Emp_Address">
<ItemStyle Width="200px" HorizontalAlign="Left" />
</asp:BoundField>

Wrapping is done based on words so that any single word is not broken in two lines.
So won't work for you if your data has long string without space.
The problem is that you can't insert spaces on your own because that may change the meaning of data.
While showing in grid we show only that long string which can be accommodated in column and then add "..." (only if string is more than what is showing) and then add a tooltip to show the full string.
That way the grid formatting is not compromised and if user wants he can hover his mouse and see the whole string.
hope this helps Example

Try setting the property RowStyle-Wrap of the GridView to True.

You can use ItemStyle-Width to fix the column width ,but in case you enter characters which can not be enclosed in given width (As seen in your image) ,column will expand as per the inputs so you can use RowStyle-Wrap property of gridview
<asp:GridView ID="grdVwtrial" runat="server" RowStyle-Wrap="true">

RowStyle-Wrap==true should work I guess. For more clarifications refer this:
http://forums.asp.net/t/1263769.aspx

Hide cells in GridView based on another column

I have the following GridView:
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataKeyNames="SysInvoiceID" DataSourceID="SqlDataSource1">
<Columns>
<asp:BoundField DataField="InvoiceID" HeaderText="SysInvoiceID" ReadOnly="True" SortExpression="SysInvoiceID" />
<asp:BoundField DataField="BillMonth" HeaderText="BillMonth" SortExpression="BillMonth" />
<asp:BoundField DataField="InvoiceDate" HeaderText="InvoiceDate" ReadOnly="True" SortExpression="InvoiceDate" />
<asp:BoundField DataField="InvoiceNumber" HeaderText="InvoiceNumber" SortExpression="InvoiceNumber" />
<asp:BoundField DataField="Net" HeaderText="Net" SortExpression="Net" />
<asp:BoundField DataField="VAT" HeaderText="VAT" SortExpression="VAT" />
<asp:BoundField DataField="Gross" HeaderText="Gross" SortExpression="Gross" />
<asp:ButtonField CommandName="ViewInvoice" HeaderText=" " ShowHeader="True" Text="View" />
</Columns>
</asp:GridView>
The very last column (ButtonField) is one I created myself just to include the text 'View' on each row, which when clicked, will bring up a PDF invoice.
I'm not sure if this is even possible, but I was wondering if it was possible to add some sort of validation for that column or something, so that if the 'InvoiceID' column is blank, the 'View' link on the corresponding row won't show up.
I felt close to doing this by going on split view in Visual Studio and then the 'Edit Columns' button on GridView tasks, but like I said I'm not sure if it's possible to do it this way and may have to resort to simply coding it.
Thanks for any help!

Use a <TemplateField> instead of a <ButtonField>
<asp:TemplateField>
<ItemTemplate>
<asp:Button runat="server" Text="View"
Visible='<%# Eval("IsEmpty(InvoiceID)") %>' CommandName="ViewInvoice" />
</ItemTemplate>
</asp:TemplateField>
And add a method to your page that is IsEmpty(string id) or whatever type your id is, and just check to see if it's empty first.
You can also add a CommandArgument attribute to the Button that will let you specify what the argument to it will be.

Use a placeholder...
<asp:Placeholder runat="server" ID="plView" Visible="<%# Convert.ToBoolean(InvoiceID == null) ? false : true %>">
<asp:ButtonField CommandName="ViewInvoice" HeaderText=" " ShowHeader="True" Text="View" />
</asp:Placeholder>