Yasserzaid's Weblog

Using Transaction with Linq

yasserzaid — Fri, 27 Nov 2009 02:02:19 +0000

try the following example to use Transaction with Linq :

– First Example :-

      DataClasses1DataContext db = new DataClasses1DataContext();
       // Get all customers list
      IQueryable list = from x in db.Customers
                                  where x.Code > 0
                                  select x;
      Customer cust1 = list.Single(x => x.Code == 1);
      Customer cust2 = list.Single(x => x.Code == 2);
      // Update the first customer object
      cust1.FirstName = “yasser”;
      cust1.LastName = “zaid”;
      // Delete the second customer object
      db.Customers.Remove(cust2);
      // The update & delete operation will execte
      // in the same transaction
      db.Connection.Open();
      db.Transaction = db.Connection.BeginTransaction();
      try
      {
          db.SubmitChanges();
          db.Transaction.Commit();
      }
      catch
      {
          db.Transaction.Rollback();
          // And do some error handling…
      }
      finally
      {
          db.Connection.Close();
          db.Transaction = null;
      }

– Second Example :-

      DataClasses1DataContext db = new DataClasses1DataContext();
      // Get all customers list
      IQueryable list = from x in db.Customers
                                  select x;
      Customer cust1 = list.Single(x => x.Code == 1);
      Customer cust2 = list.Single(x => x.Code == 2);
      // Update the first customer object
      cust1.FirstName = “yasser”;
      cust1.LastName = “zaid”;
      // Delete the second customer object
      db.Customers.Remove(cust2);
      using (TransactionScope ts = new TransactionScope())
      {
          // The update & delete operation will execte in
          //the same transaction
          db.SubmitChanges();
          ts.Complete();
      }

Hope this helps

Good Luck

Multiple Delete with Linq

yasserzaid — Thu, 26 Nov 2009 18:26:59 +0000

try this example for Multiple Delete with Linq :-

MyAppDataContext db = new MyAppDataContext();
var objCarFeature = db.CarFeatures.Where(p=> p.Car_ID == CarID);
Dt.DataTire.db.CarFeatures.DeleteAllOnSubmit(objCarFeature);
Dt.DataTire.db.SubmitChanges();

//— another way

NorthwindDataContext context = new NorthwindDataContext();
var products = context.Products.Where(p => p.CategoryID == 1);
context.Products.DeleteAllOnSubmit(products);
context.SubmitChanges();

//— another way

MyAppDataContext db = new MyAppDataContext();
var deleteRelatedRecords = from relatedRecords in db.RelatedRecords
where relatedRecords.MyForeignKeyID == MyPrimaryKeyID
select relatedRecords;
foreach (var relatedRecords in deleteRelatedRecords)
{
db.RelatedRecords.DeleteOnSubmit(RelatedRecords);
}
db.SubmitChanges();

Hope this helps

Good Luck

Set default date parameter in Linq DataSource

yasserzaid — Mon, 23 Nov 2009 09:23:22 +0000

try this example

ContextTypeName=”newDataContext” TableName=”Lists”
Where=”startDate >= DateTime.Now”>

another way

IF you wanted to do it completely in the codebehind, you can too (refer example)
and IF you want a Default date on a parameter:

    ContextTypeName=”newDataContext” TableName=”Lists”
    Where=”startDate >= @startDate”>

        ” Name=”startDate” Type=”DateTime” />

Hope this helps

Good Luck

Send Asynchronous Email using Gmail Account

yasserzaid — Thu, 19 Nov 2009 19:16:32 +0000

try this example to Send Asynchronous email

1) Create a new web site

2) In Web.Config file add this :-

3) Add new web page and in code behind :-

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Net.Mail;

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }

    protected void Button1_Click(object sender, EventArgs e)
    {
        try
        {
            System.Net.Mail.MailMessage mailMessage = new System.Net.Mail.MailMessage();
            mailMessage.To.Add(new MailAddress(“any email”));
            mailMessage.To.Add(new MailAddress(“any email”));
            mailMessage.From = new MailAddress(“any email”);
            mailMessage.Subject = “my subject”;
            mailMessage.Body = “my body”;
            mailMessage.IsBodyHtml = true;
            SmtpClient smtpClient = new SmtpClient();
            smtpClient.EnableSsl = true;
            object userState = mailMessage;
            smtpClient.SendCompleted += new SendCompletedEventHandler(smtpClient_SendCompleted);
            smtpClient.SendAsync(mailMessage, userState);
        }
        catch
        {

}
}

    void smtpClient_SendCompleted(object sender, System.ComponentModel.AsyncCompletedEventArgs e)
    {
        try
        {
            MailMessage mailMessage = default(MailMessage);
            mailMessage = (MailMessage)e.UserState;
            if ((e.Cancelled))
            {
                lblMessage.Text = “Sending of email message was cancelled. Address=” + mailMessage.To[0].Address;
            }
            if ((e.Error != null))
            {
                lblMessage.Text = “Error occured, info :” + e.Error.Message;
            }
            else
            {
                lblMessage.Text = “Mail sent successfully”;
            }
        }
        catch (Exception ex)
        {

}
}
}

Hope this helps

Good Luck

Finding IP and IP Location

yasserzaid — Tue, 10 Nov 2009 10:40:17 +0000

try this Example to Find IP and IP Location:-

1. Create new website project and Go to solution explorer.

2. Right-click on your project name

3. Click on ‘Add Web Reference’

4. Enter this address: http://tools.webmastermafia.com/GeoIPChecker.asmx

5. Drow some Button control and TextBox Control named txtIP

6. Enter this code into button_click event:

C#:
com.webmastermafia.tools.GeoIPChecker GEO = new com.webmastermafia.tools.GeoIPChecker();
lblResult.Text = GEO.GetCountry(“test@webmastermafia.com”, “test”, txtIP.Text, “CountryName”);

Visual Basic:
Dim GEO As com.webmastermafia.tools.GeoIPChecker = new com.webmastermafia.tools.GeoIPChecker();
lblResult.Text = GEO.GetCountry(“test@webmastermafia.com”, “test”, txtIP.Text, “CountryName”)

This is for check country name by IP. If you want to check City name, than use this code:

C#:
com.webmastermafia.tools.GeoIPChecker GEO = new com.webmastermafia.tools.GeoIPChecker();
lblResult.Text = GEO.GetCity(“test@webmastermafia.com”, “test”, txtIP.Text, “City”);

Visual Basic:
Dim GEO As com.webmastermafia.tools.GeoIPChecker = new com.webmastermafia.tools.GeoIPChecker();
lblResult.Text = GEO.GetCity(“test@webmastermafia.com”, “test”, txtIP.Text, “City”)

Hope this helps

Good Luck.

Close Popup window When Press Esc Key

yasserzaid — Mon, 02 Nov 2009 20:17:16 +0000

try this Example to Close Popup window When Press Esc Key using Javascript

Hope this helps

Good Luck

Increase file Uploaded size

yasserzaid — Thu, 29 Oct 2009 13:37:18 +0000

By Default, we can’t upload files with size more the 4Mb, because it’s already configured in the machine.web file. as follows:
where 4096 in kb

Although you can overload these settings in the web.config file

add in the

Which allows uploading files up to for example 5120 = 5Mb.

Hope this helps

Good Luck

AJAX Update Progress with Upload Image

yasserzaid — Tue, 27 Oct 2009 18:38:21 +0000

try this example to use AJAX Update Progress with Upload Image

1) Open VS 2005 and create new AJAX Website

2) Add new folder called “Upload” which will upload image on it

3) Add new web page

<%@ Page Language=”C#” AutoEventWireup=”true” CodeFile=”Default.aspx.cs” Inherits=”_Default” %>

Upload Image

                    ClientValidationFunction=”ValidateFile” ControlToValidate=”fileUp”
            Display=”Dynamic” ErrorMessage=”Select Image” ValidationGroup=”img” >


                            onclick=”btnAddFile_Click” OnClientClick=”javascript:return showWait();”
                Text=”Add Image” ValidationGroup=”img” />

4) In code behind in Button Click Event:-

protected void btnAddFile_Click(object sender, EventArgs e)
    {
        System.Threading.Thread.Sleep(1000);
        //string filename = System.IO.Path.GetFileName(fileUp.FileName);
        //fileUp.SaveAs(Server.MapPath(“~/Upload/”) + filename);
        string File = Guid.NewGuid().ToString() + Path.GetExtension(fileUp.FileName);
        fileUp.SaveAs(Server.MapPath(“~/Upload/”) + File);
    }

Hope this helps

Good Luck

Bind DropdownList from XML file

yasserzaid — Tue, 27 Oct 2009 16:50:21 +0000

try this example to Bind DropdownList from xml file on server

1) Open VS 2005 and create new website

2) Add new xml file “XMLFile.xml”

    1
    Nepal

    2
    India

      3
      China


      4
      Bhutan


      5
      USA

3) Add new Web page and inside it add DropdownList control

4) In Code behind add the following code:

public partial class _Default : System.Web.UI.Page
{
    public void Bind()
    {
        DataSet ds = new DataSet();
        ds.ReadXml(Server.MapPath(“~/XMLFile.xml”));

        //get the dataview of table “Country”, which is default table name
        DataView dv = ds.Tables[0].DefaultView;

        //Now sort the DataView vy column name “Name”
        dv.Sort = “Name”;
        //now define datatext field and datavalue field of dropdownlist
        DropDownList1.DataTextField = “Name”;
        DropDownList1.DataValueField = “ID”;

        //now bind the dropdownlist to the dataview
        DropDownList1.DataSource = dv;
        DropDownList1.DataBind();
    }

    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            Bind();
        }
    }
}

Hope this helps

Good Luck

Convert database tables into XML and Schema

yasserzaid — Tue, 27 Oct 2009 16:08:07 +0000

try this example :-

public partial class xml : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        string strConnect = ConfigurationManager.ConnectionStrings["Northwind"].ConnectionString;
        string strSelect = “SELECT * FROM Employees”;
        DataSet objDataSet = new DataSet();
        SqlConnection objConnect = new SqlConnection(strConnect);
        SqlDataAdapter objDataAdapter = new SqlDataAdapter(strSelect, objConnect);
        objDataAdapter.Fill(objDataSet, “Employees”);
        string strVirtualPath = Request.ApplicationPath + “/Employees.xml”;
        string strVSchemaPath = Request.ApplicationPath + “/Employees.xsd”;
        objDataSet.WriteXml(Request.MapPath(strVirtualPath));
        objDataSet.WriteXmlSchema(Request.MapPath(strVSchemaPath));
    }
}

Hope this helps

Good Luck