ForDevs

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% [?]

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();
       }
   }
}

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Popularity: 2% [?]

SELECT INTO statement can be used to create backup copy of a table.This sql statement selects records from one table according to the selection we make and inserts the result set into another new table with the table name we specify.

Syntax given below is used to make a exact copy of the table.That is it creates the table with the same no of columns and all records in the old table.

In this example a exact copy of the table employee is backed up as a new table employee_backup.

Syntax given below is used to make a new table with selected columns from old table.

In this example a copy of the table employee with only columns “employee_id,employee_name” is backed up as a new table employee_backup.

Popularity: 3% [?]

How to Open a File in Different Format

1.Create a HTML Page or JSP Page
2.Insert <%@ page contentType=”application/vnd.ms-excel” %> instead of <%@ page contentType=”application/html” %> in HTML Page or JSP Page
3.Open a File,Now its open in a Excel Sheet with Style apply in the Sheet.

For Microsoft Word

For PDF File

For Wordpad

For Microsoft Powerpoint

For Winzip

Popularity: 3% [?]

Reduce network traffic: You have to send the SQL statement across the network. With sprocs, you can execute SQL in batches, which is also more efficient.

Caching query plan: The first time the stored procedure is executed, SQL Server creates an execution plan, which is cached for reuse. This is particularly performant for small queries run frequently.

Ability to use output parameters: If you send inline SQL that returns one row, you can only get back a recordset. With stored procedures you can get them back as output parameters, which is considerably faster.

Permissions: When you send inline SQL, you have to grant permissions on the table(s) to the user, which is granting much more access than merely granting permission to execute a stored procedure

Separation of logic: Remove the SQL-generating code and segregate it in the database.

Ability to edit without recompiling: This can be controversial. You can edit the SQL in a sproc without having to recompile the application.

Find where a table is used: With stored procedures, if you want to find all SQL statements referencing a particular table, you can export the stored procedure code and search it. This is much easier than trying to find it in code.

Optimization: It’s easier for a DBA to optimize the SQL and tune the database when stored procedures are used. It’s easier to find missing indexes and such.

SQL injection attacks: Properly written inline SQL can defend against attacks, but stored procedures are better for this protection.

Popularity: 1% [?]

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

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

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Popularity: 1% [?]

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% [?]

1.Using the label element allows the user to click on the text associated with the form control instead of having to click the radio button, check box, select box, etc.

2.To associate a label with another control implicitly, the control element must be within the contents of the Label element. In this case, the Label may only contain one control element. The label itself may be positioned before or after the associated control.

Example:-

Demo Link

Popularity: 14% [?]

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: 4% [?]

1.you can now add aggregate functions to any SELECT (even without a GROUP BY clause) by specifying an OVER() partition for each function.

2.SUM(..) OVER(..) is most useful for calculating a Total or percentage of a total for each row

3.SUM() function works with any of the other aggregate functions as well, such as MIN() or AVG()

Partition by

Divides the result set into partitions. The window function is applied to each partition separately and computation restarts for each partition.

Popularity: 3% [?]