Dot Net Code Snippets

protected void Page_Load(object sender, EventArgs e)
{
string clickHandler = string.Format(
"document.body.style.cursor = 'wait'; this.value='Please wait...'; this.disabled = true; {0};",
this.ClientScript.GetPostBackEventReference(Button1, string.Empty));
Button1.Attributes.Add("onclick", clickHandler);
}

protected void Button1_Click(object sender, EventArgs e)
{
// Emulate a lengthy process of 10 seconds...
TimeSpan waitTime = new TimeSpan(0, 0, 0, 10);
System.Threading.Thread.Sleep(waitTime);

Response.Write("Button1_Click fired
");
}

Now we are going to discuss about the validate the decimal numbers it should be in the format of

     <asp:TextBox ID="Phone_TextBox" runat="server"></asp:TextBox>
        <asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server" ErrorMessage="RegularExpressionValidator"
            ValidationExpression="^\d+\.\d{2}$" ValidationGroup="phone" ControlToValidate="Phone_TextBox">it should be 125.00 this format</asp:RegularExpressionValidator>
        <asp:Button ID="Button1" runat="server" Text="Button" ValidationGroup="phone" /></div>

Hi , we already seen the CrossPage Posting so now we are going to see the concept Previouspage ( to send data from one page to another page )

in the first page ie: Webform1.aspx

<asp:TextBox ID="TextBox1" Text="xxxx" runat="server" />
<asp:LinkButton ID="LinkButton1" runat="server" Text="L”schen" PostBackUrl="~/webform2.aspx" />

<%@ PreviousPageType VirtualPath="~/Webform1.aspx"  %>

if (Page.PreviousPage != null)
            {
                TextBox oTextBox = (TextBox)Page.PreviousPage.FindControl("TextBox1");
                if (oTextBox != null)
                {
                    Response.Write(oTextBox.Text);
                }
            }

When i add ajaxtoolkit.dll file to bin folder of my new project that has been created in .net 2005 or .net 2.0 so when i place the ajax controls on my page and written some code on running the project it shows no error but code is not working on status bar i have see Error on this page

When i click the error icon it shows Sys is undefined

so the solution is you have to modify the web.config file like this.

1) Below <Configuraion> tag add this

<configSections>
<sectionGroup name="system.web.extensions" type="System.Web.Configuration.SystemWebExtensionsSectionGroup, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35">
<sectionGroup name="scripting" type="System.Web.Configuration.ScriptingSectionGroup, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35">
<section name="scriptResourceHandler" type="System.Web.Configuration.ScriptingScriptResourceHandlerSection, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" requirePermission="false" allowDefinition="MachineToApplication"/>
<sectionGroup name="webServices" type="System.Web.Configuration.ScriptingWebServicesSectionGroup, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35">
<section name="jsonSerialization" type="System.Web.Configuration.ScriptingJsonSerializationSection, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" requirePermission="false" allowDefinition="Everywhere"/>
<section name="profileService" type="System.Web.Configuration.ScriptingProfileServiceSection, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" requirePermission="false" allowDefinition="MachineToApplication"/>
<section name="authenticationService" type="System.Web.Configuration.ScriptingAuthenticationServiceSection, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" requirePermission="false" allowDefinition="MachineToApplication"/>
</sectionGroup>
</sectionGroup>
</sectionGroup>
</configSections>

<pages>
<controls>
<add tagPrefix="asp" namespace="System.Web.UI" assembly="System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
</controls>
</pages>

<compilation debug="true">
<assemblies>
<add assembly="System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
</assemblies>
</compilation>

<httpHandlers>
<remove verb="*" path="*.asmx"/>
<add verb="*" path="*.asmx" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
<add verb="*" path="*_AppService.axd" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
<add verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" validate="false"/>
</httpHandlers>
<httpModules>
<add name="ScriptModule" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
</httpModules>

<system.web.extensions>
<scripting>
<webServices>
<!-- Uncomment this line to customize maxJsonLength and add a custom converter -->
<!--
<jsonSerialization maxJsonLength="500">
<converters>
<add name="ConvertMe" type="Acme.SubAcme.ConvertMeTypeConverter"/>
</converters>
</jsonSerialization>
-->
<!-- Uncomment this line to enable the authentication service. Include requireSSL="true" if appropriate. -->
<!--
<authenticationService enabled="true" requireSSL = "true|false"/>
-->
<!-- Uncomment these lines to enable the profile service. To allow profile properties to be retrieved
and modified in ASP.NET AJAX applications, you need to add each property name to the readAccessProperties and
writeAccessProperties attributes. -->
<!--
<profileService enabled="true"
readAccessProperties="propertyname1,propertyname2"
writeAccessProperties="propertyname1,propertyname2" />
-->
</webServices>
<!--
<scriptResourceHandler enableCompression="true" enableCaching="true" />
-->
</scripting>
</system.web.extensions>

<system.webServer>
<validation validateIntegratedModeConfiguration="false"/>
<modules>
<add name="ScriptModule" preCondition="integratedMode" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
</modules>
<handlers>
<remove name="WebServiceHandlerFactory-Integrated"/>
<add name="ScriptHandlerFactory" verb="*" path="*.asmx" preCondition="integratedMode" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
<add name="ScriptHandlerFactoryAppServices" verb="*" path="*_AppService.axd" preCondition="integratedMode" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
<add name="ScriptResource" preCondition="integratedMode" verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
</handlers>
</system.webServer>

Cross page posting is submitting the form to a different page. This is usually required when you are creating a multi page form to collect information from the user on each page. When moving from the source to the target page, the values of controls in the source page can be accessed in the target page.

<:TextBox ID="TextBox1" runat="server" Text="Welcome to .NET"></asp:TextBox>

<asp:Button ID="Button1" runat="server" PostBackUrl="~/Default.aspx" Text="TargetButton" />

 <asp:Label ID="Label1" runat="server" ></asp:Label>

  if (Page.PreviousPage != null)
        {
            TextBox btn = (TextBox)(Page.PreviousPage.FindControl("TextBox1"));
            Label1.Text = btn.Text;
        }

Now we are going to see how to add Default value to Databound Dropdownlistcontrol

First Case : When user binding the dropdownlist using SqlDataSource so you have to keep in mind to use AppendDatabounditemd="True". then only you can able to add the item manually to Databound Dropdownlist Control

<asp:DropDownList ID="DropDownListFinFile" runat="server" DataSourceID="ObjectDataSourceFinFile" AutoPostBack="True" DataTextField="FinFileName" DataValueField="FinFileId" CssClass="tabletext" AppendDataBoundItems="true">
            <asp:ListItem Text="Please select" Value="">-1</asp:ListItem> 
<asp:DropDownList>

 

Now we have to discuss how to send email using GMAIL server.

Normally we can use , Gmail, Yahoo , etc.. some company having own mailserver so you have to contact your Admin to know your mailserver , id , pwd etc..

This is code to send email using Vb.Net

Imports System.Net.Mail

Protected  Sub Button1_Click
(ByVal sender As Object, ByVal e As EventArgs)
Dim mail As MailMessage =  New MailMessage()
mail.To.Add("admin@gmail.com")
mail.From = New MailAddress("admin@gmail.com")
mail.Subject = "Email using Gmail server "

dim Body as String = "Hi, this mail is to test sending mail"+
             "using Gmail in ASP.NET using vb.Net"
mail.Body = Body

mail.IsBodyHtml = True
Dim smtp As SmtpClient =  New SmtpClient()
smtp.Host = "smtp.gmail.com" 

smtp.EnableSsl = True 

smtp.Credentials = New System.Net.NetworkCredential
    ("YourUserName@gmail.com","YourGmailPassword")
smtp.Send(mail)
End Sub

Now we have to discuss how to send email using GMAIL server.

Normally we can use , Gmail, Yahoo , etc.. some company having own mailserver so you have to contact your Admin to know your mailserver , id , pwd etc..

This is code to send email using Asp.net user port no is 587 or 465 it depends upon system

declare the port below the smtp server name

smtp.port=587

using System.Net.Mail;


//Now write this code in click event of button

//C# code

protected void Button1_Click(object sender, EventArgs e)
{
  MailMessage mail = new MailMessage();
  mail.To.Add("admin@gmail.com");
  mail.From = new MailAddress("admin@gmail.com");
  mail.Subject = "Email using Gmail";

  string Body = "Hi, this mail is to test sending mail"+
                "using Gmail in ASP.NET using C#";
  mail.Body = Body;

  mail.IsBodyHtml = true;
  SmtpClient smtp = new SmtpClient();
  smtp.Host = "smtp.gmail.com"; 

  smtp.EnableSsl = true; 

  smtp.Credentials = new System.Net.NetworkCredential
       ("YourUserName@gmail.com","YourGmailPassword");
    smtp.Send(mail);
}

//you have to give your Gmail Username and password ..

Here we have to discuss about how to validation UniqueIdentifiere using REGEX


Here is the Expression


^\w{7}-\w{4}-\w{4}-\w{4}-\w{12}

Here we have to discuss about how to place the favicon on the address bar or ASP.NET Websites

You have to put this code on your head Section of your Html page..

<link rel="shortcut icon" type="image/ico" href="~/favicon.ico">



and here is web site that will convert any pic to icon



http://www.html-kit.com/favicon/

We have to discuss about how to Embed an image to Email Previous Article we are discussed passing image URL directly to body tag of Email.

So , now we Embed a Image directly to Email

See the example...

try

{

MailMessage mail = new MailMessage();

mail.To.Add("user@gmail.com");

mail.From = new MailAddress("admin@support.com");

mail.Subject = "Test with Image";

string Body = "<b> Welcome to Embed image!</b><br><BR>Online resource for .net articles.<BR><img alt=\"\" hspace=0 src=\"cid:imageId\" align=baseline border=0 >";


AlternateView htmlView = AlternateView.CreateAlternateViewFromString(Body, null, "text/html");

LinkedResource imagelink = new LinkedResource(Server.MapPath(".") + @"\images\sample.jpg", "image/jpg");


imagelink.ContentId = "imageId";

imagelink.TransferEncoding = System.Net.Mime.TransferEncoding.Base64;

htmlView.LinkedResources.Add(imagelink);

mail.AlternateViews.Add(htmlView);

SmtpClient smtp = new SmtpClient();

smtp.Host = "smtp.gmail.com";

//specify your smtp server name/ip here
smtp.EnableSsl = true;

//enable this if your smtp server needs SSL to communicate
smtp.Credentials = new NetworkCredential("username", "password");

// smtp.DeliveryMethod = SmtpDeliveryMethod.PickupDirectoryFromIis;

smtp.Send(mail);

}

catch (Exception ex)

{

Response.Write(ex.Message);

}

Hi Good day to all

Here We have to discuss about , how to embed the image to an email actually , Embedding an image will affect performance so here , i am passing the image URL directly to the body tag

so , here the code..

try

       {

           MailMessage mail = new MailMessage();

           mail.To.Add("user@gmail.com");

           mail.From = new MailAddress("admin@support.com");

           mail.Subject = "Test with Image";

           string Body = "<b>Welcome to Pass Image URL to Email Body!</b><br><BR>Online resource for .net articles.<BR><img alt=\"\" hspace=0 src='http://www.idealsd.co.uk/images/addmenu.jpg' align=baseline border=0 >";


           AlternateView htmlView = AlternateView.CreateAlternateViewFromString(Body, null, "text/html");

           mail.AlternateViews.Add(htmlView);

           SmtpClient smtp = new SmtpClient();

           smtp.Host = "smtp.gmail.com";

           //specify your smtp server name/ip here
           smtp.EnableSsl = true;

           //enable this if your smtp server needs SSL to communicate
           smtp.Credentials = new NetworkCredential("Username", "password");

          // smtp.DeliveryMethod = SmtpDeliveryMethod.PickupDirectoryFromIis;

           smtp.Send(mail);

       }

       catch (Exception ex)

       {

           Response.Write(ex.Message);

       }

ASP Snippets | Issue - allowDefinition = 'MachineToApplication' beyond application level

Shared via AddThis

It wont allow spaces before or after the digits but it wont if there are only spaces so you need RequiredFieldValidator too
the RegularExpressionValidator to validate the phone number without using JavaScript. So something like this:

<asp:regularexpressionvalidator id="RegularExpressionValidator1">
ControlToValidate="TextBox1"
ValidationExpression="\d+"
Display="Static"
EnableClientScript="true"
ErrorMessage="Please enter numbers only"
runat="server"/>

Here we have to see the sample of stringbuilder ,

System.StringBuilder is mutable where variety of operations can be performed

System.String is immutable variable value may change BUT original data value will be discarded and new value will be in memory.

Add one listbox on your webform and add three items on design mode.

protected void Page_Load(object sender, EventArgs e)
   {
       StringBuilder builder = new StringBuilder();
       for (int i = 0; i < array =" new" x =" this.ListBox1.Items[i].ToString();"> 0)
           {
               if ((builder.Length) != (ListBox1.Items.Count))
               {

                   builder.Append(",");
                   // x += ",";
               }
           }
        
          // Response.Write(builder);
        
       }
       string s = builder.ToString();
       s = s.Substring(0, s.Length - 1);
       Response.Write(s);
  }

Here we are going to discuss how to get the absolute path of the image or link on tinyMCE Editor contorl , by default it took relative path of the image so here it line you have to include on your script of your page.

relative_urls: false,