Archive for the ‘Dot Net’ Category

Convert Text to Image using c#

February 13th, 2009 admin

We can Convert text to image in c# using System.Drawing namespace.
Here we create a bitmap image and use its Graphics property to convert text passed to image and place the image in a picture box.

private void TextToImage()
{
Color BackColor = Color.White;
String FontName = "Times New Roman";
int FontSize = 25;
int Height = 50;
int Width = 300;
<span style="color: rgb(56, 118, 29);">
//creating bitmap image
<span style="color: rgb(0, 0, 0);">Bitmap </span></span>bitmap = new Bitmap(Width, Height);
 
<span style="color: rgb(56, 118, 29);">//FromImage method creates a new Graphics from the specified Image.</span>
Graphics graphics = Graphics.FromImage(bitmap);
Color color = Color.Gray;
Font font = new Font(FontName, FontSize); 
 
SolidBrush BrushBackColor = new SolidBrush(BackColor);
Pen BorderPen = new Pen(color);
 
Rectangle displayRectangle = new Rectangle(new Point(0, 0), new Size(Width - 1, Height - 1));
<span style="color: rgb(56, 118, 29);">//Drawing a rectangle and filling the background as white
<span style="color: rgb(0, 0, 0);">graphics</span></span>.FillRectangle(BrushBackColor, displayRectangle);
graphics.DrawRectangle(BorderPen, displayRectangle); <span style="color: rgb(56, 118, 29);">
 
//giving the font and color to the string passed</span>
graphics.DrawString(txtEnter.Text,font,Brushes.Red, 0, 0);
pictureBox1.Image = bitmap;
 
}

Download

Popularity: 15% [?]

Posted in C# Tags: 1 Comment »

Get available server names of Sql Server within the local network – SqlDataSourceEnumerator

January 7th, 2009 admin

SqlDataSourceEnumerator is a class in .net framework that gets the available instances of SQL Server within the local network.

DataTable dt = SqlDataSourceEnumerator.Instance.GetDataSources();

SqlDataSourceEnumerator.Instance.GetDataSources() returns a datatable with the available servers in the current network.

The DataTable returned as 4 colunms such as :-

  • ServerName
  • InstanceName
  • IsClustered
  • Version

Popularity: 1% [?]

Posted in C# Tags: No Comments »

Sorting Program using C#

January 2nd, 2009 admin 
namespace SortingNos
{
   class Program
   {
       static void Main(string[] args)
       {
           Console.WriteLine("Enter Numbers :");
           int[] arr = new int[5];
           string arr1 = "";
           for (int i = 0; i < 5; i++)
 {
 arr1 = Console.ReadLine();
 arr[i] = Convert.ToInt32(arr1);            
}
 
 int a, b, temp = 0;
 Console.WriteLine();
 for (a = 0; a < arr.Length; a++)
           {
                               for(b=a+1;b< arr.Length;b++)
               {
                   if (arr[a] > arr[b])
                   {
                       temp = arr[a];
                       arr[a] = arr[b];
                       arr[b] = temp;
                   }
               }             
               Console.WriteLine(arr[a]);              
           }          
          Console.ReadLine();
       }
   }
}

Download

Popularity: 5% [?]

Posted in C# Tags: No Comments »

How to Upload File in Asp.net

December 12th, 2008 admin

Here in this example we browse a file from our pc and upload that file to some other location in our pc.

Default.aspx

<input type=file id=File1 name=File1 runat=”server”>
<input type=”submit” id=”Submit1″ value=”Upload” runat=”server” name=”Submit1″>

Defalut.aspx.cs

protected void Submit1_ServerClick(object sender, EventArgs e)
{
if( ( File1.PostedFile != null ) && ( File1.PostedFile.ContentLength > 0 ) )
{
string fn = System.IO.Path.GetFileName(File1.PostedFile.FileName);

//Create Data Folder within the Location u Specified
string SaveLocation = “D:\UploadedFiles” + “\” + fn;

//File will be Uploaded to the Specified Location
try
{
File1.PostedFile.SaveAs(SaveLocation);
Response.Write(“The file has been uploaded.”);
}
catch ( Exception ex )
{
Response.Write(“Error: ” + ex.Message);
}
}
else
{
Response.Write(“Please select a file to upload.”);
}
}

You can give the specified location to upload in SaveLocation string.

Download

Popularity: 2% [?]

Posted in Asp.net Tags: No Comments »

Simple Add,Edit,Retrieve and Delete in Asp.net

December 9th, 2008 admin

Here is a example application of Add,Edit,Retrieve and Delete operations using Asp.net. Download Creating a table employeeinfo for proceeding the operations. Sql Table Creation 

CREATE TABLE employeeinfo ( empid INT NOT NULL PRIMARY KEY, empname VARCHAR(50), empaddress VARCHAR(200), empsalary INT )

Declaring Connection String and Variables

Namespace : using System.Data.SqlClient;  string QryStr = ""; SqlConnection con = new SqlConnection("Server=servername;Integrated Security=true;Database=employee"); SqlCommand cmd; SqlDataReader dr;

In this example i have used windows authentication.You have to change the connection string according your specification. Adding Records

QryStr = "INSERT INTO employeeinfo VALUES('" +txtEmpId.Text + "','" + txtEmpName.Text + "','" + txtEmpAdd.Text + "','" + txtEmpSal.Text + "')"; con.Open(); cmd = new SqlCommand(QryStr, con); cmd.CommandType = CommandType.Text; cmd.ExecuteNonQuery(); con.Close();

Updating Records

QryStr = "UPDATE employeeinfo SET empname = '"+txtEmpName.Text+"',empaddress = '"+txtEmpAdd.Text+"',empsalary = '"+txtEmpSal.Text+"' WHERE empid = '"+txtEmpId.Text+"'"; con.Open(); cmd = new SqlCommand(QryStr, con); cmd.CommandType = CommandType.Text; cmd.ExecuteNonQuery(); con.Close();

Retrieve Records to textboxes Records will be Retrieved from the database and displayed in the text boxes when text change of employee id is fired.

QryStr = "SELECT * FROM employeeinfo WHERE empid = '" + txtEmpId.Text + "'";  con.Open(); cmd = new SqlCommand(QryStr, con); dr = cmd.ExecuteReader(); dr.Read(); if (dr.HasRows) { txtEmpName.Text = dr["empname"].ToString(); txtEmpAdd.Text = dr["empaddress"].ToString(); txtEmpSal.Text = dr["empsalary"].ToString(); } else { txtEmpName.Focus(); } con.Close();

Deleting Records

QryStr = "DELETE FROM employeeinfo WHERE empid = '" + txtEmpId.Text + "'"; con.Open(); cmd = new SqlCommand(QryStr, con); cmd.CommandType = CommandType.Text; cmd.ExecuteNonQuery(); con.Close();

Popularity: 2% [?]

Posted in Asp.net Tags: , No Comments »

Absolute Position for Controls in Asp.net

December 3rd, 2008 admin

By default for controls placed in the designer the layout position is as ‘Not Set’ thus we cannot drag the control to a specified location.


We have to change the layout position to absolute position to achieve that.

In Visual Studio we can make the default postion as we need.For that we have to enable the css postioning of controls.

Here is how we can do

1. Go to Layout->Position->Auto-position Options->HTML Designer–>CSS Styling

or

2. Go to Tools->Options->HTML Designer–>CSS Positioning

And check “Change positioning to the following for controls added using Toolbox, paste or drag and drop” and select the postion you perfer.Here we select Absolute Positioning.

Now we can move the controls placed in the designer with absolute positioning.

The Given Procedure is for Visual Studio 2005 which is same for Visual Studio 2008.

Popularity: 17% [?]

Posted in Tips And Tricks, Visual Studio 6 Comments »

Encrypting text value using MD5 in Dot Net

November 20th, 2008 admin

For example we will have two textboxes such as ‘TextBox1′ and ‘TextBox2′.Now we will encrypt ‘TextBox1′ value using MD5 in Dot Net and display the encrypted value in ‘TextBox2′.

string pwd = “”;
 
pwd = System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(TextBox1.Text, “MD5″);
 
TextBox2.Text = pwd;

Popularity: 1% [?]

Posted in C# Tags: No Comments »

Function To Generate Random Password using C#

November 14th, 2008 admin

usually you would send a random generated password while user does the registration process through your application.You can use the following code to achieve that.

public string Generate_Password()
{
string Password = “”;
byte Cnt, Idx;
string values = “0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ”;
Random rnd = new Random();
for (Cnt = 1; Cnt &lt;= 6; Cnt++)
{
Idx = (byte)rnd.Next(0, values.Length);
Password += values.Substring(Idx, 1);
}
return Password.Trim().ToUpper();
}

To Generate Random Password we have used the Random Class(Namespace:-System).To learn more about Random Class have a look at this MSDN LINK.

Popularity: 4% [?]

Posted in C# Tags: No Comments »

What is Delegate?

November 12th, 2008 admin

A delegate is a type that references a method.Once a delegate is assigned a method, it behaves exactly like that method. The delegate method can be used like any other method,with parameters and a return value.

Any method that matches the delegate’s signature,which consists of the return type and parameters,can be assigned to the delegate.

Delegates allow methods to be passed as parameters.It can be used to define callback methods.

Popularity: 1% [?]

Posted in C#, What-is Tags: 1 Comment »

What is ViewState ?

November 10th, 2008 admin

ASP.NET view state is the technique used by an ASP.NET Web page to persist
changes to the state of a Web Form across postbacks.That is when a form is submitted in ASP .NET, the form reappears in the browser window together with all form values.

The ViewState indicates the status of the page when submitted to the server. The status is defined through a hidden field placed on each page with a <form runat=”server”> control.

Hidden field placed on each page would be something as this
< input type=”hidden” name=”__VIEWSTATE” value=”CEbzzzEnmmz+Bc8IDFlnpgCLJ/HB00.” >
Maintaining the ViewState is the default setting for ASP.NET Web Forms. If you want to NOT maintain the ViewState, include the directive l%@ Page EnableViewState=”false” %> at the top of an .aspx page or add the attribute EnableViewState=”false” to any control.

Popularity: 1% [?]

Posted in Asp.net, What-is Tags: No Comments »
RSS FeedSubscribe to our RSS feed!
Follow us on Twitter!Follow us on Twitter!

  • Sponsor

Designed by: Business Web Hosting | Thanks to Buy Icons, travel tips and Used Cars