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  • Why is there no Sum() extension for IEnumerable<uint>

    - by dss539
    It seems that Sum not defined for IEnumerable<uint> (and other unsigned integers, for that matter) var s = new int[] { 1, 2, 3 }; s.Sum(); //works fine var us = new uint[] { 1, 2, 3 }; us.Sum(); //missing method I would like to know: Have I done something fundamentally wrong/misunderstood the situation? What design decisions might cause the omission of IEnumerable<uint>.Sum()? MSDN: Enumerable.Sum

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  • Is it possible to link a method marked with MethodImplOptions.InternalCall to its implementation?

    - by adrianbanks
    In trying to find the possible cause of an exception, I'm following a code path using Reflector. I've got deeper and deeper, but ended up at a method call that looks like: [MethodImpl(MethodImplOptions.InternalCall)] private extern void SomeMethod(int someParameter); This markup on the method tells the framework to call a C++ function somewhere. Is there any way to find out what method actually gets called, and in turn what else is likely to be called? NB: I don't really want to see the source code of this method, I just want to know the possible things that could throw the exception I am seeing that originates out of this method call.

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  • Calling an HTML table from code behind

    - by user279521
    Hi, I am trying to access an HTML table from code behind, and set its visible="false" property (depending on what value the user has selected). The table has an id value and a runat=server attribute. How can I call the table from the code behind in C# 2008 and set its display?

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  • Does C# 4's covariance support nesting of generics?

    - by Scott Bilas
    I don't understand why 'x' below converts, but 'y' and 'z' do not. var list = new List<List<int>>(); IEnumerable<List<int>> x = list; List<IEnumerable<int>> y = list; IEnumerable<IEnumerable<int>> z = list; Does the new covariance feature simply not work on generics of generics or am I doing something wrong? (I'd like to avoid using .Cast< to make y and z work.)

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  • While remote deubgging how are the pdb located (VS 2008)

    - by Saar
    When the deubgger is attached to a process on remote server - What locations are searched for the pdb? In what order? (e.g. is it searched on the remote server (debuggee) or on the local client (deubger)) When I use the deubgger to manually load pdb file from specific location - is the deubbger looking for the file locally or is it the remote debugger monitor looking for the file on the? Is there any article that describes that process?

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  • how to post a form upon click on checkbox ?

    - by user281180
    I have a form (displayed as a dialog) in which I have various checkboxes. On a click on any of the checkboxes, I want to post the form values to the controller and still doesn`t want my dialog to close. How can I do that? I don`t have a submit button on the form. Ajaxpost closes the dialog after form.submit... What method can I use?

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  • Alert box not being called upon button click

    - by user279521
    I have a fairly simple code, a button click event, with the first line being a message box. When the button is clicked, the messagebox is not called. protected void btnSubmitToCRM_Click(object sender, EventArgs e) { ClientScript.RegisterStartupScript(GetType(), "alert", "alert('btnSubmitToCRM_Click - 1');", true); if (!ValidateCoreValue()) { ClientScript.RegisterStartupScript(GetType(), "alert", "alert('btnSubmitToCRM_Click - 1 - False');", true); return; } } Any ideas?

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  • Table Design for (Currently Viewing Videos)?

    - by Surya sasidhar
    hi, I am doing a project on video portal, in that i am trying to place for currently viewing videos. People who r currently viewing that video. For this i have design the table like this table:(columns) Sno,videoid,sessionid,userid,createddate these are the columns but it is not sufficient i think if possible can u help me how can i design the table. how can we perfectly represent the currently viewing videos. Please help me thank you

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  • exception at process.start(), of The parameter is incorrect

    - by user1163428
    i am trying to start a c++ exe file from c# by a click of a button , but it is throwing an Exception of type 'System.Exception' at process.start(); , although the file is correct . i have tried : private void button2_Click(object sender, EventArgs e) { myProcess.StartInfo.UseShellExecute = false; myProcess.StartInfo.FileName = "E:\\tc\\5a.exe"; myProcess.StartInfo.CreateNoWindow = true; myProcess.Start(); } when i view details of this exception it shows "The parameter is incorrect" the file is present at e:\tc when i do same thing but in filename i keep "cmd.exe" it works . thank you in advance

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  • $(selector).text() equivalent in c# (Revised)

    - by Ian Jasper Bardoquillo
    Hi, I am trying check if the inner html of the element is empty but I wanted to do the validation on the server side, I'm treating the html as a string. Here is my code public string HasContent(string htmlString){ // this is the expected value of the htmlString // <span class="spanArea"> // <STYLE>.ExternalClass234B6D3CB6ED46EEB13945B1427AA47{;}</STYLE> // </span> // From this jquery code--------------> // if($('.spanArea').text().length>0){ // // } // <------------------ // I wanted to convert the jquery statement above into c# code. /// c# code goes here return htmlSTring; } using this line $('.spanArea').text() // what is the equivalent of this line in c# I will know if the .spanArea does really have something to display in the ui or not. I wanted to do the checking on the server side. No need to worry about how to I managed to access the DOM I have already taken cared of it. Consider the htmlString as the Html string. My question is if there is any equivalent for this jquery line in C#? Thanks in advance! :)

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  • MVC -DropDownList - Categories - SubCategories

    - by Frajer
    In my database I have tbales: categoreis and SubCategoreis. I would Like to create one Dropdownlist containg both of these. Something like: «Välj» <option value='1000' style='background-color:#dcdcc3;font-weight:bold;' id='cat1000' > -- FORDON -- /// this is from Categoreis Table </option> <option value='1020' id='cat1020' > Bilar /// this is from SubCategoreis </option> <option value='1040' id='cat1040' > Bildelar & Biltillbehör /// this is from Categoreis </option> <option value='1060' id='cat1060' > Båtar /// this is from Categoreis </option> <option value='1080' id='cat1080' > Båtdelar & tillbehör /// this is from Categoreis </option> Any samples how I could solve this? should I use Helpers or MVCUsercontrol??? I think that caching is importatnt in this case.Help me out ! Thanks!!

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  • What would be the best way to store the questions and responses for a survey where I need to keep th

    - by Ian Roke
    Background I am writing a survey that is going to a large audience. It contains 15 questions and there are five possible answers to each question along with potential comments. The user can cycle through all 15 questions answering them in any order and is allowed to leave the survey at any point and return to answer the remaining questions. Once an answer has been attempted on all 15 questions a submit button appears which allows them to submit the questions as final answers. Until that stage all answers are required to be retrievable whenever the user loads the survey page up. The requirement is that the user only sees one question on a page and 'Previous' and 'Next' buttons allow the user to scroll through the questions. Requirement I could request the question each time the user clicks a button and save the current response and so on but that would be a large number of hits to a database that is already heavily used. I don't have the time to procure a new server etc so I have to make do with what I have. Is there any way I can cache the questions on the user machine and/or responses? Obviously I need the response data to be secure and only known to the user so I feel a little bit stuck as for the best way of doing this. Any pointers? I am prepared to offer a bounty of 100 points on this question if it means I get some good quality discussion and feedback going.

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  • How to check the status (True/False) in a grid view on rowdatabound event?

    - by NayeemKhan
    Hi all, I have a table with three columns (ProdID,ProdName,Status). I m fetching that into a dataSet and binding that to my gridview. I have a very basic and simple rowdatabound event like this : protected void gvProducts_RowDataBound(object sender, GridViewRowEventArgs e) { if (e.Row.RowType == DataControlRowType.DataRow) { if (e.Row.Cells[2].Text == "False") { e.Row.BackColor = System.Drawing.Color.PaleVioletRed; } } } But when i see my 3rd column (Status), it is converted to a checkbox, may be becz its containing only 'True' or 'False'. Also in my if condition : if (e.Row.Cells[3].Text == "False") the text value is showing this : "" Can anybody suggest me, how can i compare my status against True or False in my if condition.

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  • Adding to an Array

    - by j-t-s
    Hi All I have an array: String[] ay = { "blah", "blah number 2" "etc" }; ... But now I want to add to this array at a later time, but I see no option to do so. How can this be done? I keep getting a message saying that the String cannot be converted to String[]. Thank you

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  • Are static members of a generic class tied to the specific instance?

    - by mafutrct
    This is more of a documentation than a real question. I noticed the principle it is not described on SO yet (did I miss it?), so here goes: Imagine a generic class that contains a static member: class Foo<T> { public static int member; } Is there a new instance of the member for each specific class, or is there only a single instance for all Foo-type classes? It can easily be verified by code like this: Foo<int>.member = 1; Foo<string>.member = 2; Console.WriteLine (Foo<int>.member); What is the result, and where is this behavior documented?

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