C# ASP.NET StringBuilder Source Code Example
StringBuilder Source Code Example
Purpose: – Illustrates using StringBuilder and StringBuilder Methods in C-Sharp ASP.NET.
Prerequistes:
- Install Visual Web Developer 2008
- Install SQL Server Express
- Download Northwind and Pubs Databases
- Attach Northwind Database to Databases in Sql Express
- Attach pubs Database to Databases in Sql Express
Notes:
- You can build your own library of syntax examples by using same web site over and over and just add new web forms to it.
Instructions:
- Use Visual Web Developer 2008
- Create new web site;
- Click File/New Web Site
- Select ASP.NET Website Template
- Select C-Sharp for Language
- name of Web Site could be CSharp_ASPNET_Syntax.
- Add New folder named “LanguageBasics”
- Right-click project name in solution explorer;
- add new folder;
- name of folder could be: LanguageBasics
- Add Web Form Named StringBuilder to LanguageBasics folder
- Right-click LanguageBasics folder;
- add new item;
- Select Web Form
- Check place code behind in separate file
- Web Form name could be StringBuilder
- Click on copy code in code below to copy code into web form StringBuilder.aspx
- Click on copy code in second set of code below to copy code into code-behind StringBuilder.aspx.cs
- Right-click on StringBuilder.aspx in solution explorer and select view in browser
Step 1: Click on Copy Code to Cut-n-paste code into StringBuilder.aspx
< %@ Page Language="C#" AutoEventWireup="true" CodeFile="StringBuilder.aspx.cs" Inherits="LanguageBasics_StringBuilder" %> < !DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head id="Head1" runat="server"> <title></title> </head> <body> <form id="form1" runat="server"> <div> <asp :Label ID="Label1a" runat="server" Text="Label"></asp><br /> <asp :Label ID="Label1" runat="server" Text="Label"></asp><br /><br /> <asp :Label ID="Label2a" runat="server" Text="Label"></asp><br /> <asp :Label ID="Label2" runat="server" Text="Label"></asp><br /><br /> <asp :Label ID="Label3a" runat="server" Text="Label"></asp><br /> <asp :Label ID="Label3" runat="server" Text="Label"></asp><br /><br /> <asp :Label ID="Label4a" runat="server" Text="Label"></asp><br /> <asp :Label ID="Label4" runat="server" Text="Label"></asp><br /><br /> <asp :Label ID="Label5a" runat="server" Text="Label"></asp><br /> <asp :Label ID="Label5" runat="server" Text="Label"></asp><br /><br /> </div> </form> </body> </html> |
Step 2: Click on Copy Code to Cut-n-paste code into SqlCommandUpdate.aspx.cs
using System.Text; using System; partial class LanguageBasics_StringBuilder : System.Web.UI.Page { protected void Page_Load(object sender, System.EventArgs e) { //**************************************************************************************** // Example #1: StringBuilder Append(string) - most common way stringbuilder is used // Adds the specified string or string representation of the specified value to the end // of the string //**************************************************************************************** StringBuilder sb = new StringBuilder(); Label1a.Text = "Example #1: Simple StringBuilder Append(string) "; sb.Append("First Line"); sb.Append("<br />"); sb.Append("Second Line"); Label1.Text = sb.ToString(); //Append(string, startIndex, count) //**************************************************************************************** // Example #2: StringBuilder Append(string, startIndex, count) // Adds a substring of the specified string, starting with the specified // position and having the specified length, to the end of the string //**************************************************************************************** StringBuilder sb2 = new StringBuilder(); Label2a.Text = "Example #2: StringBuilder Append(string, startIndex, count)"; sb2.Append("The dog and cat "); sb2.Append("love to fight and play", 0, 13); //take love to fight and add to end of prev string Label2.Text = sb2.ToString(); //Insert(index, string[, count]) //**************************************************************************************** // Example #3: StringBuilder Insert(index, string[, count]) // Inserts the specified string or a string representation of the specified // value at the specified position in the string the specified number of // times. If the count is ommitted, a single copy of the string is inserted. //**************************************************************************************** StringBuilder sb3 = new StringBuilder(); Label3a.Text = "Example #3: Insert(index, string[, count])"; sb3.Append("This is the initial sentence"); sb3.Insert(20, "and modified ", 2); Label3.Text = sb3.ToString(); //Remove(startIndex,count) //**************************************************************************************** // Example #4: StringBuilder Remove(startIndex,count) // Removes the specified number of characters from the string starting at // the specified position //**************************************************************************************** StringBuilder sb4 = new StringBuilder(); Label4a.Text = "Example #4: StringBuilder Remove(startIndex,count)"; sb4.Append("This is the initial sentence"); sb4.Remove(20, 8); Label4.Text = sb4.ToString(); //Replace(oldString,newString [,startIndex][,count]) //**************************************************************************************** // Example #5: StringBuilder Replace(oldString,newString [,startIndex][,count]) // Replaces all occurences of the old string with the new string starting // at the specified position and continuing for the specified number of characters. // If you omit startIndex, it starts at beginning // If you omit count, it does entire string //**************************************************************************************** StringBuilder sb5 = new StringBuilder(); Label5a.Text = "Example #5: StringBuilder Replace(oldString,newString [,startIndex][,count])"; sb5.Append("This is the initial sentence"); sb5.Replace("initial", "new"); Label5.Text = sb5.ToString(); } } |
Step 3: Click on Copy Code to Cut-n-paste code into web.config right after the appSettings section
<connectionstrings> <add name="Northwind_ConnectionString" connectionString="Server=(local)\SQLEXPRESS;Initial Catalog=Northwind;Integrated Security=SSPI" /> <add name="Pubs_ConnectionString" connectionString="Server=(local)\SQLEXPRESS;Initial Catalog=pubs;Integrated Security=SSPI" /> </connectionstrings> |