Skip to main content

Merge GridView Cells Or Columns in Row ASP.NET C# VB.NET




In this example i am going to describe how to merge GridView cells or Columns in gridview rows containing same data or content using C# and VB.NET in ASP.NET

For this i m using DataBound Event of gridview, counting total rows and then checking each cells value against value of same cell in previous row and then setting the RowSpan of cells.


For this i have created a table containing Counties ,states and respective cities and country and state cells / columns are merged in rows having same country or states.


For knowing how to merge Gridview headers read article below
Merging GridView Header Columns or multiple Headers


You would also like to read
Hide GridView Columns In Normal Mode and Visible In Edit

Running Total In Gridview Footer in ASP.NET C# VB.NET











Html source of the page look like this 
<asp:GridView ID="GridView1" runat="server" 
    AutoGenerateColumns="False"  
    BorderStyle="None" BorderWidth="1px" CellPadding="4" 
    GridLines="Horizontal" ForeColor="Black" 
    Height="119px" DataSourceID="SqlDataSource1" 
    OnDataBound="GridView1_DataBound1"> 
            <Columns>
            <asp:BoundField DataField="Country" 
                            HeaderText="Country" 
                            SortExpression="Country" />
            <asp:BoundField DataField="State" 
                            HeaderText="State" 
                            SortExpression="State" />
            <asp:BoundField DataField="City" 
                            HeaderText="City" 
                            SortExpression="City" />
        </Columns>
</asp:GridView>
<asp:SqlDataSource ID="SqlDataSource1" runat="server" 
ConnectionString="<%$ ConnectionStrings:ConnectionString %>"
SelectCommand="SELECT [Country], [State], [City] 
               FROM [Details] ORDER BY [State]">
</asp:SqlDataSource>

C# code behind
01protected void GridView1_DataBound1(object sender, EventArgs e)
02{
03  for (int rowIndex = GridView1.Rows.Count - 2;
04                                     rowIndex >= 0; rowIndex--)
05  {
06    GridViewRow gvRow = GridView1.Rows[rowIndex];
07    GridViewRow gvPreviousRow = GridView1.Rows[rowIndex + 1];
08    for (int cellCount = 0; cellCount < gvRow.Cells.Count;
09                                                  cellCount++)
10    {
11     if (gvRow.Cells[cellCount].Text ==
12                            gvPreviousRow.Cells[cellCount].Text)
13     {
14       if (gvPreviousRow.Cells[cellCount].RowSpan < 2)
15       {
16         gvRow.Cells[cellCount].RowSpan = 2;
17       }
18       else
19       {
20        gvRow.Cells[cellCount].RowSpan =
21            gvPreviousRow.Cells[cellCount].RowSpan + 1;
22       }
23       gvPreviousRow.Cells[cellCount].Visible = false;
24    }
25   }
26 }
27}
VB.NET code behind
01Protected Sub GridView1_DataBound1
02           (ByVal sender As Object, ByVal e As EventArgs)
03 
04For rowIndex As Integer = GridView1.Rows.Count - 2 To 0 Step -1
05    Dim gvRow As GridViewRow = GridView1.Rows(rowIndex)
06    Dim gvPreviousRow As GridViewRow = GridView1.Rows(rowIndex + 1)
07    For cellCount As Integer = 0 To gvRow.Cells.Count - 1
08    If gvRow.Cells(cellCount).Text =
09                         gvPreviousRow.Cells(cellCount).Text Then
10    If gvPreviousRow.Cells(cellCount).RowSpan < 2 Then
11    gvRow.Cells(cellCount).RowSpan = 2
12    Else
13    gvRow.Cells(cellCount).RowSpan =
14                       gvPreviousRow.Cells(cellCount).RowSpan + 1
15    End If
16    gvPreviousRow.Cells(cellCount).Visible = False
17    End If
18    Next
19  Next
20End Sub
Download sample code attached

Comments

Post a Comment

Popular posts from this blog

GRIDVIEW GROUPING

When displaying data, we sometimes would like to group data for better user experience or when displaying long list of hierarchal data, we would want to display them in a tree view kind of structure. There is more than way of doing this, but I am going to explain achieving this functionality using  AJAX Collapsible Panel Extender Control . Overview: I am going to use  Adventure Works  as datasource. Every product in  Production.Product  table belongs to a product sub category. We fetch handful of products and the sub categories they belong to from the database. Our objective is to list all the available sub categories and allow user to  expand/collapse  to look/hide the list of products belonging to each subcategory. Database Connection Added following entry under  connectionStrings  element in  web.config . < add   name = "Sql"   connectionString="Data Source=(local); Initial  Catalog = AdventureWorks ...
Post a Comment
Read more

Dynamic Generation of Word Document Report in ASP.NET with HTML

Overview Ever needed to generate Word documents from your ASP.NET applications? There are a couple of components which will help to generate Word documents, but using these components may have some overhead such as Component Registration, setting permissions, licenses, etc., Sometimes, it may even become difficult to understand their features and use them. Generating word document in ASP.NET with HTML is incredibly easy. The following sample demonstrates how to place Heading and Table dynamically in the word document in ASP.NET web applications using HTML. Requirements Microsoft Visual Web Developer 2005 Express Edition Create the Web Application project Add the new Web Site Application project (with name as Generate Word Document) and place the button (with name as btnGenerateDocument) in the Default.aspx web form as shown below. Double click the highlighted code behind file from the Solution Explorer and add the following namespaces. Listing 1 using  System...
Post a Comment
Read more

GRIDVIEW ZOOM IMAGE

When you have images in your  GridView , you would most likely show them as thumbnails so as to not distort the whole layout. However user would want to look at the full image by clicking on the image or just hovering his mouse over it. In today’s applications, this is a basic requirement and there are just so many third party controls or plugins which would support this functionality. I am going do this conventional way using  javascript  way in this article.  On top of it, I am also going to explain how to get images from database using  HttpHandlers . Example: I am using  Adventure Works  as datasource. We fetch handful of products and bind them to the grid. When page is initially loaded, we retrieve products from Production . Product  table and bind them to the grid. We display some product attributes such as Product ID, Product Number, Product Name, List Price and product’s thumbnail. When user hover his mouse on the page, we fetch the f...
Post a Comment
Read more