Skip to main content

GRIDVIEW RUNTIME TEMPLETE FIELD

In some complex scenarios developers need to create runtime GridView dynamically. So obviously developers need to create dynamic columns for dynamic gridviews. Here in this article I will explain how one can develop or implement runtime dynamically create bound column as well as template column of a GridView control and also how to bind data into the dynamically created GridView. For simplicity here i use a datatable but you can bind data from database as well. Here I also showed how developers can write dynamic event handler for dynamically created button within the template column. The output will be:
Dynamic GridView

Creating bound column is easier than template column because if you want to add dynamic template column in your GridView then you must implement ITemplate interface. When you instantiate the implemented object then it will automatically call the "InstantiateIn" method. To implement my example first add a class in your project and named it "TemplateHandler". Then copy the code sample:
using System;
using System.Web.UI;
using System.Web.UI.WebControls;

public class TemplateHandler : ITemplate
{
    void ITemplate.InstantiateIn(Control container)
    {
        Button  cmd= new Button();
        cmd.ID = "cmd";
        cmd.Text = "HI";
        cmd.Click += new EventHandler(Dynamic_Method);
        container.Controls.Add(cmd);
    }

    protected void Dynamic_Method(object sender, EventArgs e)
    {
        ((Button)sender).Text = "Hellooooo";
    }
}

Now add a page in your project & copy the below codes under page_load event:
protected void Page_Load(object sender, EventArgs e)
    {
        DataTable dt = new DataTable();

        dt.Columns.Add("FirstName");
        dt.Columns.Add("LastName");
        dt.Columns.Add("Age", typeof(System.Int32));

        DataRow oItem = dt.NewRow();
        oItem[0] = "Shawpnendu";
        oItem[1] = "Bikash";
        oItem[2] = 32;
        dt.Rows.Add(oItem);

        oItem = dt.NewRow();
        oItem[0] = "Bimalendu";
        oItem[1] = "Bikash";
        oItem[2] = 27;
        dt.Rows.Add(oItem);


        GridView gv = new GridView();
        gv.AutoGenerateColumns = false;

        BoundField nameColumn = new BoundField();
        nameColumn.DataField = "FirstName";
        nameColumn.HeaderText = "First Name";
        gv.Columns.Add(nameColumn);

        nameColumn = new BoundField();
        nameColumn.DataField = "LastName";
        nameColumn.HeaderText = "Last Name";
        gv.Columns.Add(nameColumn);

        nameColumn = new BoundField();
        nameColumn.DataField = "Age";
        nameColumn.HeaderText = "Age";
        gv.Columns.Add(nameColumn);

        // Here is template column portion
        TemplateField TmpCol = new TemplateField();
        TmpCol.HeaderText = "Click Me";
        gv.Columns.Add(TmpCol);
        TmpCol.ItemTemplate = new TemplateHandler();        

        gv.DataSource = dt;
        gv.DataBind();

        Form.Controls.Add(gv);
    }

Comments

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 ...

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...

Editing Child GridView in Nested GridView

Editing Child GridView in Nested GridView In this article we will explore how to edit child gridview in the nested gridview.   Let''s write some code. Step 1:  Add scriptmanager in the aspx page. < asp : ScriptManager   ID ="ScriptManager1"   runat ="server"   EnablePageMethods ="true"> </ asp : ScriptManager > Step 2:  Add below stylesheet for modal popup. < style   type ="text/css">        .modalBackground        {              background-color : Gray;              filter : alpha(opacity=80);              opacity : 0.5;       }        .ModalWindow        {     ...