Thursday, August 6, 2009

Export Grid to Excel

Export to Excel

In this article we are going to read and understand how in a web application we can export a grid data in the excel file. As many times in real time programming we generate reports in the grid format to display to the user.

For example

1 .The list of commodities purchased this month

2. Reports of SMS Sent.

3. Reports of invites. etc.and user might want to save this list for the future use. In Excel format then we need to export this grid to the excel.

Prerequisites:

1. To view an Excel workbook file's contents, you must have installed Microsoft Excel (alone or with MS-Office) on your system.

2. Microsoft Visual Studio (VS) must be installed on the (I haven't tested it on the Prior versions)

Let's start with creating an application in VS2008 (You can even go for VS2005 or VS2010)

Following the steps to we are going to follow.

  1. Create a new project in VS2008 as name it as "ExporttoExcel" in the C# category.
  2. Place a gridview on the default.aspx page and rename it to grdtoexport.
  3. And place a button which will export the grid to excel.
  4. Now lets create a datatable which will bind the grid.

The Code will look like:

protected void Page_Load(object sender, EventArgs e)

{

//creating a table for the grid use namespace System.Data;

DataTable dt = new DataTable ();

//adding columns to the datatale

try

{

dt.Columns.Add("Srno");

dt.Columns.Add("Name");

}

catch { }

//adding values to the datatable

for (int i = 1; i <= 10; i++)

{

DataRow dr = dt.NewRow();

dr[0] = i;

dr[1] = "Meetu Choudhary " + i.ToString();

dt.Rows.Add(dr);

}

//binding databale to the grid

grdtoexport.DataSource = dt;

grdtoexport.DataBind();

}

Writing a ExportToExcel class

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Data;

using System.Configuration;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

using System.Text;

using System.IO;

namespace ExportToExcel

{

/// <summary>

/// Summary description for ExportToExcel

/// </summary>

public class ExportToExcel

{

public ExportToExcel()

{

//

// TODO: Add constructor logic here

//

}

public void ExportGridView(GridView GridView1, String strFileName)

{

PrepareGridViewForExport(GridView1);

//string attachment = "attachment; filename=Contacts.xls";

HttpContext.Current.Response.ClearContent();

HttpContext.Current.Response.Buffer = true;

HttpContext.Current.Response.AddHeader("content-disposition", "attachment;filename=" + strFileName);

HttpContext.Current.Response.ContentType = "application/ms-excel";

HttpContext.Current.Response.Charset = "";

//System.Web.UI.Page.EnableViewState = false;

StringWriter sw = new StringWriter();

HtmlTextWriter htw = new HtmlTextWriter(sw);

GridView1.RenderControl(htw);

HttpContext.Current.Response.Write(sw.ToString());

HttpContext.Current.Response.End();

}

private void PrepareGridViewForExport(Control gv)

{

LinkButton lb = new LinkButton();

Literal l = new Literal();

string name = String.Empty;

for (int i = 0; i < gv.Controls.Count; i++)

{

if (gv.Controls[i].GetType() == typeof(LinkButton))

{

l.Text = (gv.Controls[i] as LinkButton).Text;

gv.Controls.Remove(gv.Controls[i]);

gv.Controls.AddAt(i, l);

}

else if (gv.Controls[i].GetType() == typeof(DropDownList))

{

l.Text = (gv.Controls[i] as DropDownList).SelectedItem.Text;

gv.Controls.Remove(gv.Controls[i]);

gv.Controls.AddAt(i, l);

}

else if (gv.Controls[i].GetType() == typeof(CheckBox))

{

l.Text = (gv.Controls[i] as CheckBox).Checked ? "True" : "False";

gv.Controls.Remove(gv.Controls[i]);

gv.Controls.AddAt(i, l);

}

if (gv.Controls[i].HasControls())

{

PrepareGridViewForExport(gv.Controls[i]);

}

}

}

/*Use this commented function in all the pages where the above export function is used

//public override void VerifyRenderingInServerForm(Control control)

//{

//}*/

}

}

Calling the Function to export on button click

protected void btnexport_Click(object sender, EventArgs e)

{

ExportToExcel ex = new ExportToExcel();

ex.ExportGridView(grdtoexport, "Client.xls");

}



You can download the code from here


Regards, Meetu Choudhary
Microsoft MVP-ASP/ASP.NET

MsDnM My Forums My Blog

Monday, August 3, 2009

Progress Bar demo

Hi All,

I am Developing this Application just to help a newbie in the technology and even many of my students have asked me for the application which will demonstrate them how to use a progress bar in C#.net for a windows application. So here is a small application which will solve the purpose.

So Here Is the application and description how to develop the application.

1. Create a New Project in VS 2008 or above as per your convince I have installed VS 2008 so I am using that if you want to use VS 2005 you can even go with that also. For now VS2008


2. Create New Project : Select Windows Forms Application under the Visual C# tab and give the name to the project as prjProgressBar.

3. Now Place The ProgressBar Control and the Button Tool on the form from the tools box as shown in the figure below.

4. Set the following Properties of the progress bar:

  • Minimum =0 (By Default). This value will specify the lower bound for the progress bar.
  • Maximum =500 (Default value is 100). This is the upper bound value of the progress bar when progress is complete.
  • Step= 5 (Default is 10) This value is the value by which the progressbar will increase the current value with the next step when performstep function will be called. (in this case 500/5=100 i.e. in ten steps we will complete the progressbar.)
  • Value =0 (Default is 0) This will set or get the current value of the progressbar.
  • Style is the cosmetic property of the control default is blocks you may change it to marquee or continues. I am not changing it.
  • MarqueeanimationSpeed=100 (default is also 100): this is the speed in milisseconds set for the animation of the progressbar.

Now On the button click event we will start the progress bar and show a message at final step that in how many steps we have completed the progress bar. The code will be:

private void button1_Click(object sender, EventArgs e)
{
int i = 0;
while (progressBar1.Value < progressBar1.Maximum )
{
MessageBox.Show("Step : " + i);
}
}

>Now The above code I have written on the button click so you can write it at any place you needed. Suppose You want that as the data is begin added in the database then you need to perform a step in the database you can do that. But in that case you should set the maximum value of the progressbar to the total no. of records to be inserted and this will be set by the code at the event where you have calculated the total no. of records. with the help of this line.

progressBar1.Maximum=NoRecs;

and the step value should be 1 and when the insertion is completed in the database then use
progressBar1.PerformStep();
line of code there.

The Sample Code is attached.


Thanks and Regards
Meetu Choudhary
MVP || My Blog || MySite || My Forums

Thursday, July 30, 2009

How to use combo box in silverlight

After reading this article we will be able to use a comboobx in a Silverlight application as we are habitual of using it with the formal application. Normally we would like to have a combo box which will show the name of the article or any thing which we would like that our client should see but internally we like to use the ID the primary key or something else to use for the internal purpose. So here are the steps we are going to follow.

Creating the Design Page For the Combobox Application.
1. Open Visual Studio 2008 or above. Create new Project.
2. Select the language C#, Silverlight Project.
3.Name it Combox.
4.Click ok.
5.Leave the Rest Settings as default.
6.Now open MainPage.xaml. modify the grid add the HorizontalAlignment="Left"
VerticalAlignment="Top"
7. And now And now add the Textblock (Label) like this:
<TextBlock Height="17.09" Grid.Column="0" Grid.Row="0" Width="100.303" Canvas.Left="260" Canvas.Top="38.91" Text="Client Name" TextWrapping="Wrap"
Foreground
="#FF000000" FontSize="16" Margin="12,0,8,5" />
8. In the next column of grid Add the Combobox. like:
<ComboBox x:Name="cmbClient" Grid.Column="1" Grid.Row="0" SelectionChanged="cmbClient_SelectionChanged"></ComboBox>
9. Not going into more Designing Issues. Lets Finish it here. And Start Our Coding.
10. Creating a button so that onclick of that button we can get the
Information of the Client
<Button x:Name="btn" Click="btn_Click" Content="Get Info" Grid.Column="0" Grid.Row="1"></Button>

Now lets create a class with the following Member Properties
Client ID
Client Name
Client Address
Client Mobile number

Now open the MainPage.xaml.cs File And create the following Class
public class MyClients
{
#region Pubic Property
public int pkid;
public string ClientName { get; set; }
public string ClientAddress { get; set; }
public string ClientMobile { get; set; }
#endregion
}

In Next strep we will Creat a List<T> type of variables which will hold the List of MyClients to be displayed in the comboobx. Like:

public static List<MyClients> clientlist = new List<MyClients>();

Now next step is to create a function which will add the MyClients to the List Here is the function.

public voidAddClients()
{
MyClients mynewclient = new MyClients();
mynewclient.ClientAddress = "Jaipur";
mynewclient.ClientMobile = "1234567890";
mynewclient.ClientName = "Meetu Choudhary";
mynewclient.pkid = 1;
clientlist.Add(mynewclient);
//Adding 2nd CLient
mynewclient = newMyClients();
mynewclient.ClientAddress = "Jaipur";
mynewclient.ClientMobile = "1234567890";
mynewclient.ClientName = "Anita Choudhary";
mynewclient.pkid = 2;
clientlist.Add(mynewclient);
//Adding 3rd client
mynewclient = new MyClients();
mynewclient.ClientAddress = "Delhi";
mynewclient.ClientMobile = "1234567890";
mynewclient.ClientName = "Raman Mehta";
mynewclient.pkid = 3;
clientlist.Add(mynewclient);
//Adding 4th client
mynewclient = new MyClients();
mynewclient.ClientAddress = "Delhi";
mynewclient.ClientMobile = "1234567890";
mynewclient.ClientName = "Gaurav Arora";
mynewclient.pkid = 4;
clientlist.Add(mynewclient);
}

Now we need to call this function in the MainPage so the code of MainPage will now
look like
public MainPage()
{
InitializeComponent();
/*From here I added the code*/
AddClients();
//Telling the combobox which member to be displayed
cmbClient.DisplayMemberPath = "ClientName";
//Telling the Source of the List
cmbClient.ItemsSource = clientlist;
//This line will set the selected item
cmbClient.SelectedIndex = 1;
}

Now We will again declare a public static variable to access the object through out the page.
public static MyClients selectedcl;

Now setting the above variable on the selectionchanged event:
private void cmbClient_SelectionChanged(object sender,SelectionChangedEventArgs e)
{
selectedcl = (MyClients)cmbClient.SelectedItem;
}

and Finally the code for the click event:

private void btn_Click(object sender, RoutedEventArgs e)
{
MessageBox.Show("Client Name : " + selectedcl.ClientName + Environment.NewLine
+ "Client Address : " + selectedcl.ClientAddress + Environment.NewLine
+ "Client Mobile : " + selectedcl.ClientMobile + Environment.NewLine
+ "ID : " + selectedcl.pkid);
}


Now run and see the combox in active Code is attached
Download Code

Saturday, July 25, 2009

Google Code Search

Hey,

Just came across a great link to search codes by Google Here It is

http://www.google.co.in/codesearch

Hope you too will enjoy the searching

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