C#

Generic Methods

2013-05-25T09:59:17.58-04:00

Hey Developers ..

I just want to write a code once to save records in multiple tables ... I want to implement Generic Methods .I have three .aspx pages where I require to save data in three different tables ...Please forward me complete steps. .please forward c# code only ..Thanks

Get weeks List of Current month in c# dropdownlist

2013-05-25T09:04:51.723-04:00

Hi all,

* I have task which I need to get number of weeks in current month and bind to dropdown-list

* and in dropdownlist it should have date & day of the week which starts and ends.Example as below the first week of the this may month starts on from (wednesday)05/01/2013 and ends with 05/01/2013(Sunday)

(wednesday)05/01/2013 - 05/01/2013(Sunday)

Can any one help me how can i solve this issue

A boolean parameter. Why do you sometimes have to use required: false?

2013-05-24T09:58:02.737-04:00

Hi,

whats the difference between using required: false and using false as a parameter?

Thanks.

Why Partial Class is Used?

2013-05-23T10:39:30.44-04:00

What is useful purpose of partial class?

Is it sort of class re-factoring?

How I can return the ID after insert a record into a database Firebird 2.5 with Linq? using Visual C # WPF VS 2010

2013-05-24T05:10:01.93-04:00

How I can return the ID after insert a record into a database Firebird 2.5 with Linq? using Visual C # WPF VS 2010, a model already loaded in my project.

Change the format of am email address C#

2013-05-23T20:20:09.5-04:00

Hello all!
I have an email address like this, I am a user on a domain.
BGD.ORG\\some.name

I would like to format it in C# to be this:
some.name@BGD.ORG
I am quite new to C# and any directio would be helpful. Thank you.

Export to pdf and email

2013-05-23T15:32:16.413-04:00

Hi All,

I have a gridview from which I need to export data to pdf. I'm following the below way to achieve this

dt = (DataTable)Session["dt"];

        //create dynamic gridview
        GridView dgDgrid = new GridView();
        dgDgrid.AllowPaging = false;
        dgDgrid.DataSource = dt;

        //Create bound fields
        BoundField dgc_reqId = new BoundField();
        dgc_reqId.DataField = "Field1";
        dgc_reqId.HeaderText = "Field1";
        dgDgrid.Columns.Add(dgc_reqId);

        BoundField dgc_expItem = new BoundField();
        dgc_expItem.DataField = "Field2";
        dgc_expItem.HeaderText = "Field2";
        dgDgrid.Columns.Add(dgc_expItem);

        BoundField dgc_expDate = new BoundField();
        dgc_expDate.DataField = "Field3";
        dgc_expDate.HeaderText = "Field3";
        dgDgrid.Columns.Add(dgc_expDate);

        BoundField dgc_fromDate = new BoundField();
        dgc_fromDate.DataField = "Field4";
        dgc_fromDate.HeaderText = "Field4";
        dgDgrid.Columns.Add(dgc_fromDate);

        dgDgrid.AutoGenerateColumns = false;
        dgDgrid.DataBind();
        dgDgrid.Caption = "<b>Report</b>";
         
        //Generate PDF file
        Response.ContentType = "application/pdf";
        Response.AddHeader("content-disposition", "attachment;filename= " + Session["username"] + "_Report.pdf");
        Response.Cache.SetCacheability(HttpCacheability.NoCache);
        StringWriter sw = new StringWriter();
        HtmlTextWriter hw = new HtmlTextWriter(sw);
        sw.WriteLine(dgDgrid.Caption);
        dgDgrid.RenderControl(hw);
        StringReader sr = new StringReader(sw.ToString());
        Document pdfDoc = new Document(PageSize.A5, 10f, 10f, 10f, 0f);
        HTMLWorker htmlparser = new HTMLWorker(pdfDoc);
        PdfWriter.GetInstance(pdfDoc, Response.OutputStream);
        pdfDoc.Open();
        pdfDoc.AddHeader("Head", "Project Report");
        htmlparser.Parse(sr);
        pdfDoc.Close();
        Response.Write(pdfDoc);
        Response.End();

Here instead of downloading the pdf i need to email to the user attaching the currently generated pdf..

Any idea how to achieve this?

Appreciate your help.

Interface Members only public

2013-05-22T20:45:05.99-04:00

Why interface members are only public?? Why not protected or any other access specifiers we can use in interface members??

difference between class variable and class object c#

2013-05-16T05:46:11.433-04:00

I am confused somebody tell me-

what is difference between class variable and class object c#

with example

Abstract generic class

2013-05-22T12:08:05.707-04:00

I'm building an abstract class for my BLL, MyClass<TKey, TItem> where TKey is int or short in most cases and TItem is a local class.

The class will include:

- SortedList<TKey, TItem>

- Typed TableAdapter from DAL

- Typed DataTable from DAL

- Update, Insert, Select methods - parameters for them change according to TItem

How can this be implemented?

Thank You.

About some structures in my code

2013-05-22T11:12:47.553-04:00

Hi There;

As a Java backgrounded programmer, I see some structure that it doesn't make sense to me. Colud you please explain it?

Thanks in advance.

protected NationalParkShopDataSet dsShop
        {
            get
            {
                return ((NationalParkShopDataSet)Session["__dsShop"]);
            }
            set
            {
                Session["__dsShop"] = value;
            }
        }

access hotmail calendar events C#

2013-05-21T17:32:45.747-04:00

how can i access hotmail calendar events using c#?

Error CS0006: Metadata file 'System.Collections.dll' could not be found

2013-05-21T10:10:28.89-04:00

I have a requirement were i need to create dynamic assembly at runtime. If i use simple addition function which retun interger sum then its working fine but when i use LINQ functionality inside my function then CompilerResults as error.

I already add respective assembly references and do many work around but none of them works.

Does anyone knows how to solve this issue.

protected void Button4_Click(object sender, EventArgs e)
    {
        StringBuilder sb = new StringBuilder();
        sb.Append(" public class MyClass {   ");
	sb.AppendLine();
        sb.Append("  public  MyClass(){ } ");
	sb.AppendLine();
        sb.Append("  public List<int> GetLinq()  ");
	sb.AppendLine();
        sb.Append("  {  ");
	sb.AppendLine();
        sb.Append("   List<int> lst = new List<int> { 1,2,3};");
	sb.AppendLine();
        sb.Append("   var source = lst.AsQuerable(); ");
	sb.AppendLine();
        sb.Append("   var obj = from i in source select i; ");
	sb.AppendLine();
        sb.Append("   return obj.ToList<int>();
	sb.AppendLine();
        sb.Append("  } ");
	sb.AppendLine();
        sb.Append(" } ");
	sb.AppendLine();
        //
        string functionName = "GetLinq";
       

        CodeDomProvider provider;
        string language = "cs";

        Dictionary<string, string> compilerInfo = new Dictionary<string, string>();
        compilerInfo.Add("CompilerVersion", "v3.5");

        // Check for a provider corresponding to the input language.
        if (CodeDomProvider.IsDefinedLanguage(language))
        {
            
            provider = new Microsoft.CSharp.CSharpCodeProvider(compilerInfo);

            
            CompilerInfo langCompilerInfo = CodeDomProvider.GetCompilerInfo(language);
            CompilerParameters langCompilerConfig = langCompilerInfo.CreateDefaultCompilerParameters();
            langCompilerConfig.ReferencedAssemblies.Add("System.dll");
            langCompilerConfig.ReferencedAssemblies.Add("System.Core.dll");
            langCompilerConfig.ReferencedAssemblies.Add("System.Data.dll");
            langCompilerConfig.ReferencedAssemblies.Add("System.Xml.dll");
            langCompilerConfig.ReferencedAssemblies.Add("System.Collections.dll");
            langCompilerConfig.GenerateInMemory = true;
            langCompilerConfig.TreatWarningsAsErrors = false;
            langCompilerConfig.CompilerOptions = "/optimize";
            //
            CompilerResults results = provider.CompileAssemblyFromSource(langCompilerConfig, sb.ToString());
            if (results.Errors.Count > 0)
            {
                Response.Write("Errors Occured" + results.Errors.Count);
                return;
            }

            else
            {
                Type dynamicType;
                dynamicType = results.CompiledAssembly.GetType("MyClass");
                MethodInfo method;
                method = dynamicType.GetMethod(functionName);
                var obj =  method.Invoke(null, null);
            }

        }
        else
        {
            // Tell the user that the language provider was not found.
            Response.Write("There is no support for input language \""+language+"\".");
            //return null;
        }

    }

Declaring Readonly inside a Method of a Class

2013-05-22T01:14:10.04-04:00

Hi everyone,

I have created a class and there is one public method in the class. Can I create a readonly field inside that method ? I was trying to that but was getting an error that "Modifier is not valid for this item".

But if I create constant then there is no error. Can you please guide me why its happening ?

Thanks and Regards

Ritesh

linq to fetch index of string array

2013-05-21T08:55:54.713-04:00

var _Col_Name_lst = (from DataColumn x in _hdr[0].Table.Columns
select x.ColumnName).ToArray();

_Col_Name_lst ----- This has a collection of string array

0 - EMl

1 - AZEER

2 - VISTA

--------

Here in above collection, i require array index of EMI or AZEER or VISTA whichever i pass to a linq.

so using linq on above collection --- "_Col_Name_lst "

i require index of any values EMI or AZEER or VISTA whichever i pass

    var _Col_Name = from col in _Col_Name_lst
                                  where col == ("EML_power")
                                  select col.IndexOf("EML_power");

Read a Remote Html file in C#

2013-05-21T18:08:58.94-04:00

Hi,

I want to read the HTML which exists on a server using c# but it shows an error of

URI formats are not supported
The file's path are not supported

i've tried with the following code

using (FileStream fs = new FileStream("http://192.168.0.1/MySite/Default.html", FileMode.Open))

                using (FileStream fs = new FileStream(@"192.168.0.1\D:\Web\www\MySite\Default.html", FileMode.Open))
                {
                    if (fs.Length == 0)
                    { }
                    else
                    {
                        using (StreamReader sr = new StreamReader(fs))
                        {
                            
                            for (int i = 0; i < 2; i++)
                            {
                                string temp = "";
                                while ((temp = sr.ReadLine()) != null)
                                {
                                    status[i] = temp;
                                }
                            }
                        }
                    }
                }

What is the correct way?

Tell me please

Thanx in Advance

Query Problem

2013-05-21T15:40:29.587-04:00

Dear All,

i am trying to compare a Sessions list with another list after splitting with comma in where command and unable to do that, here is the query.

public static List<CorporatesInvoice> SelectInvoicesForCorporates(int CorporateID, int CenterID, List<int> SessionID, LanguageEnum languageParam)
        {
  ELSPortalDataContext db = new ELSPortalDataContext();
  var obj = (from r in db.SessionClassStudents
             join j in db.CorporateInvoices.ToList().Where(o => o.ObjectID.Split(',').ToList().All(c => SessionID.Contains(Convert.ToInt32(c)))) on CorporateID equals j.CorporateID
            select new CorporatesInvoice
                    {

                    }

lets say List of SessionID is [47,48,49] and string ObjectID in db is like 48,49. if SessionID is matching completely with object ID only then that record should return i.e if List of Session ID have 45,44 and ObjectID in db also have the same 45,44 -> this could be in reverse order

kindly take a look especially at highlited code and let me know what is wrong and how to make it working? it says "Local sequence cannot be used in LINQ to SQL implementations of query operators except the Contains operator"

Thanks alot.

Help needed in LINQ query

2013-05-21T14:22:35.867-04:00

Hi Guys,

i have a problem in a query, i am trying to split a string with comma and then i am trying to compare all splitted values with the list of sessions, here is the code

public static CorporateInvoice SelectInvoiceByCorporateAndSession(int CorporateID, List<int> SessionID)
 {
            ELSPortalDataContext db = new ELSPortalDataContext();
            return db.CorporateInvoices.SingleOrDefault(o => o.CorporateID == CorporateID && o.ObjectID.Split(',').ToList().Any(c => SessionID.Select(k => k.ToString()).Contains(c)));
        
}

i am unable to do and getting error "Method 'System.String[] Split(Char[])' has no supported translation to SQ"

Please help.

Thanks

problem converting VB to C#

2008-08-29T16:11:06.273-04:00

HI Guys,

I am writing server side validation in c# which was in VB

the code in VB is

If Not IsNumeric(Args.Values("BookQty")) Then
    Args.Cancel = True
    EditMSG.Text = "&bull; Quantity is not numeric"

If Args.Values("BookQty") < 0 Then
      Args.Cancel = True
      EditMSG.Text = "&bull; Quantity is out of range"
    End If

the code I converted to c# using converter

These are two errors

if (!IsNumeric(Args.NewValues["BookQty"]))
        {
            Args.Cancel = true;
            EditMSG.Text = "•Quantity is not numeric";

The name 'IsNumeric' does not exist in the current context

 if ((Args.Values["BookQty"] < 0))
        {
            Args.Cancel = true;
            EditMSG.Text = "• Quantity is out of range";
        }

Operator '<' cannot be applied to operands of type 'object' and 'int'

can anybody please help me.

Find time difference between 01.30pm to 11.30pm Using c#.net

2013-05-20T07:23:23.4-04:00

Ho to find out the Time Difference ( Difference will include HH:MM) Between the 01.30pm to 11.30pm using the C#.net ?