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ASP.NET Hosting - ASPHostPortal.com :: How to Prevent ASP.NET Website From Multiple Database Request

clock October 26, 2015 20:44 by author Dan

It is not good to execute multiple db request for loading single page.  Review your database code to see if you have request paths that go to the database more than once. Each of those round-trips decreases the number of requests per second your application can serve. By returning multiple resultsets in a single database request, you can cut the total time spent communicating with the database.

In order to improve performance you should execute single stored proc and bring multiple resultset in to single db request.  In this article i will explain you how to avoid multiple database request and how to bring multiple resultset into single db request.

Consider a scenario of loading a Product Page, which displays

  • Product Information and
  • Product Review Information

In order to bring 2 database request in single db request, your sql server stored proc should be declared as below.

SQL Server Stored Proc

CREATE PROCEDURE GetProductDetails
 @ProductId bigint,
AS
SET NOCOUNT ON

--Product Information
Select ProductId,
 ProductName,
 ProductImage,
 Description,
 Price
From Product
Where ProductId = @ProductId

--Product Review Information
Select  ReviewerName,
 ReviewDesc,
 ReviewDate
From ProductReview
Where ProductId = @ProductId

Asp.net, C# Code to bring multiple db request into single db request

Code Inside Data Access Class Library (DAL)

public DataSet GetProductDetails()
{
SqlCommand cmdToExecute = new SqlCommand();
cmdToExecute.CommandText = "GetProductDetails";
cmdToExecute.CommandType = CommandType.StoredProcedure;
DataSet dsResultSet = new DataSet();
SqlDataAdapter adapter = new SqlDataAdapter(cmdToExecute);

try
{
    var conString = System.Configuration.ConfigurationManager.ConnectionStrings["ConnStr"];
    string strConnString = conString.ConnectionString;
    SqlConnection conn = new SqlConnection(strConnString);

    cmdToExecute.Connection = conn;

    cmdToExecute.Parameters.Add(new SqlParameter("@ ProductId", SqlDbType.BigInt, 8, ParameterDirection.Input, false, 19, 0, "", DataRowVersion.Proposed, _productId));

    //Open Connection
    conn.Open();

    // Assign proper name to multiple table
    adapter.TableMappings.Add("Table", "ProductInfo");
    adapter.TableMappings.Add("Table1", "ProductReviewInfo");
    adapter.Fill(dsResultSet);

    return dsResultSet;             
}
catch (Exception ex)
{
    // some error occured.
    throw new Exception("DB Request error.", ex);
}
finally
{
    conn.Close();
    cmdToExecute.Dispose();
    adapter.Dispose();
}
}

Code Inside Asp.net .aspx.cs page

protected void Page_Load(object sender, EventArgs e)
{
   if (Request.QueryString[ProductId] != null)
   {
      long ProductId = Convert.ToInt64(Request.QueryString[ProductId].ToString()); 
  
      DataSet dsData = new DataSet();

      //Assuming you have Product class in DAL
      ProductInfo objProduct = new ProductInfo();
      objProduct.ProductId = ProductId;
      dsData = objProduct.GetProductDetails();

      DataTable dtProductInfo = dsData.Tables["ProductInfo"];
      DataTable dtProductReviews = dsData.Tables["ProductReviewInfo"];

      //Now you have data table containing information
      //Make necessary assignment to controls
      .....
      .....
      .....
      .....
      ..... 

    }
}


Finish, Happy coding.

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ASP.NET Hosting - ASPHostPortal.com :: How to Remove Html Tags from a String in ASP.NET

clock October 12, 2015 07:47 by author Dan

When we update content using WYSIWYG HTML editor (ck-editor) then it used HTML tag for formatting the content. But some time we need the same content without any formatting so then we require the removing HTML tag from that content.

Here I use two variation for this first one is using a simple loop And Second one is using Regex.

// How convert a html tag to blank space in a string using c#.net/asp.net code
// Replacing the html tag <> to blank space, you can copy data with html tag and then convert to normal text
// eg. INPUT   -->  <div width="5">Testing <i>Testing</i></div>
        OUTPUT--> Testing Testing
//
//C#.NET , ASP.NET

Method 1 : (Using Character Array)

 public string replace(string s)
 {
    int l = s.Length;
    int j = 0;
    char[] ch = s.ToCharArray();
    s = "";
    for (int i = 0; i < l; i++)
    {
        if (ch[i] == '<')
            j = 1;
        if (j == 1)
        {
            if (ch[i] == '>')
                j = 0;
            ch[i] = ' ';
        }
        s = s + ch[i].ToString();
    }
    return (s);
 }

Method 2 (Using Regular Expressions- Regex)

 using System.Text.RegularExpressions;
 public string replace(string s)
 {
   String result = Regex.Replace(s, @"<[^>]*>", String.Empty);
 }

Finish.. Happy Codiing..

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