Skip to main content

Nested GridView Example In Asp.Net With Expand Collapse



This example shows how to create Nested GridView In Asp.Net Using C# And VB.NET With Expand Collapse Functionality.
I have used JavaScript to Create Expandable Collapsible Effect by displaying Plus Minus image buttons.

Nested GridView Example In Asp.Net With Expand Collapse

Customers and Orders Table of Northwind Database are used to populate nested GridViews.

Drag and place SqlDataSource from toolbox on aspx page and configure and choose it as datasource from smart tags

Go to HTML source of page and add 2 TemplateField in <Columns>, one as first column and one as last column of gridview.

Place another grid in last templateField column.

Markup of page after adding both templatefields will like as shown below.



HTML SOURCE
   1:  <asp:GridView ID="gvMaster" runat="server" 
   2:                AllowPaging="True" 
   3:                AutoGenerateColumns="False" 
   4:                DataKeyNames="CustomerID" 
   5:                DataSourceID="SqlDataSource1" 
   6:                onrowdatabound="gvMaster_RowDataBound">
   7:  <Columns>
   8:  <asp:TemplateField>
   9:      <ItemTemplate>
  10:      <a href="javascript:collapseExpand('customerID-
  11:               <%# Eval("CustomerID") %>');">
  12:      <img id="imagecustomerID-<%# Eval("CustomerID") %>" 
  13:           alt="Click to show/hide orders" 
  14:           border="0" src="plus.png" /></a>
  15:      </ItemTemplate>
  16:  </asp:TemplateField>
  17:  <asp:BoundField DataField="CustomerID" 
  18:                  HeaderText="CustomerID"/>
  19:  <asp:BoundField DataField="CompanyName" 
  20:                  HeaderText="CompanyName"/>
  21:   
  22:  <asp:TemplateField>
  23:  <ItemTemplate>
  24:  <tr><td colspan="100%">
  25:  <div id="customerID-<%# Eval("CustomerID") %>" 
  26:       style="display:none;
  27:       position:relative;left:25px;">
  28:       
  29:  <asp:GridView ID="nestedGridView" runat="server" 
  30:                AutoGenerateColumns="False" 
  31:                DataKeyNames="OrderID">
  32:  <Columns>
  33:  <asp:BoundField DataField="OrderID" HeaderText="OrderID"/>
  34:  <asp:BoundField DataField="OrderDate" HeaderText="OrderDate"/>
  35:  <asp:BoundField DataField="Freight" HeaderText="Freight"/>
  36:  </Columns>
  37:  </asp:GridView>
  38:  </div>
  39:  </td></tr>
  40:  </ItemTemplate>
  41:  </asp:TemplateField>
  42:  </Columns>
  43:  </asp:GridView>
  44:   
  45:  <asp:SqlDataSource ID="SqlDataSource1" runat="server" 
  46:  ConnectionString="<%$ ConnectionStrings:ConnectionString %>" 
  47:  SelectCommand="SELECT [CustomerID], [CompanyName] 
  48:                 FROM [Customers]">
  49:  </asp:SqlDataSource>

Add following JavaScript in head section of page.
01<script type="text/javascript">
02function collapseExpand(obj)
03{
04  var gvObject = document.getElementById(obj);
05  var imageID = document.getElementById('image' + obj);
06 
07  if (gvObject.style.display == "none")
08      {
09         gvObject.style.display = "inline";
10         imageID.src = "minus.png";
11      }
12  else
13     {
14         gvObject.style.display = "none";
15         imageID.src = "plus.png";
16     }
17}
18</script>

Write following code in RowDataBound Event of parent Grid to populate nested gridview.

C#
01protected void gvMaster_RowDataBound(object sender, GridViewRowEventArgs e)
02    {
03        if (e.Row.RowType == DataControlRowType.DataRow)
04        {
05            string customerID = Convert.ToString(DataBinder.Eval(e.Row.DataItem, "CustomerID"));
06            GridView gvChild = (GridView)e.Row.FindControl("nestedGridView");
07            SqlDataSource gvChildSource = new SqlDataSource();
08            gvChildSource.ConnectionString = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
09            gvChildSource.SelectCommand = "SELECT [OrderID], [OrderDate],[Freight] FROM [Orders] WHERE [CustomerID] = '" + customerID + "'";
10            gvChild.DataSource = gvChildSource;
11            gvChild.DataBind();
12        }
13    }

VB.NET
01Protected Sub gvMaster_RowDataBound(sender As Object, e As GridViewRowEventArgs)
02 If e.Row.RowType = DataControlRowType.DataRow Then
03  Dim customerID As String = Convert.ToString(DataBinder.Eval(e.Row.DataItem, "CustomerID"))
04  Dim gvChild As GridView = DirectCast(e.Row.FindControl("nestedGridView"), GridView)
05  Dim gvChildSource As New SqlDataSource()
06  gvChildSource.ConnectionString = ConfigurationManager.ConnectionStrings("ConnectionString").ConnectionString
07  gvChildSource.SelectCommand = "SELECT [OrderID], [OrderDate],[Freight] FROM [Orders] WHERE [CustomerID] = '" + customerID + "'"
08  gvChild.DataSource = gvChildSource
09  gvChild.DataBind()
10 End If
11End Sub

Build and run the application to test GridView Inside Grid.

Download Sample Code

Comments

Post a Comment

Popular posts from this blog

JQuery lightbox image slideshow gallery in asp.net

Introduction: In this article I will explain how to create lightbox image slideshow in asp.net using JQuery. Description:  In previous post I explained about  Ajax SlideshowExtender sample  to display images slideshow. Now in this article I will explain how to create lightbox image slideshow in asp.net using JQuery. In many websites generally we will see different types of slideshows like whenever we click on image that is automatically open with lightbox effect and we have a chance to see all the remaining images by press next or previous options in slideshow. All these Slideshows are implemented by using JQuery plugins. After seen those slideshows I decided to write post to use JQuery plugins to implement beautiful slideshown in asp.net.  To implement this one I am using  previous post  insert and display images from folder based on imagepath in database  because in that post I explained clearly how to insert images into our project folder a...
Post a Comment
Read more

Scrollable GridView with Fixed Headers using jQuery Plugin

Using the same example I have created a jQuery Plugin for Scrollable GridView with Fixed header so that you can directly make a GridView scrollable.   HTML Markup < form   id ="form1"   runat ="server"> < asp : GridView   ID ="GridView1"   runat ="server"   AutoGenerateColumns   =   "false"> < Columns > < asp : BoundField   DataField   =   "ContactName"   HeaderText   =   "Contact Name"   /> < asp : BoundField   DataField   =   "City"   HeaderText   =   "City"   /> < asp : BoundField   DataField   =   "Country"   HeaderText   =   "Country"   /> Columns > asp : GridView > form >   Applying the Scrollable Grid jQuery Plugin < script   src ="Scripts/jquery-1.4.1.min.js"   type ="text/javascript"> script > < script   src ="Scripts/Scro...
Post a Comment
Read more

Generics

Generics allow us to have type or method which can operate on objects of various types, while providing type safety at the compile time. That means if you define generics class object of type Integer & you are trying to add different type of variable to generic class like String then it will give compile time error. In another sense, if we try to add different types in same list like string and int in a same list then compile time error will be thrown. Generics are available under the namespace System. Collections .Generic. The concept of type parameters is introduce to the .NET Framework with the help of Generics, which makes it possible to design classes & methods which defer the specification of one or more types until that class or method is declared and instantiated by the client code. public class MyGenericClass { void Add(T val) { } ...
Post a Comment
Read more