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  • .NET TCP socket with session

    - by Zé Carlos
    Is there any way of dealing with sessions with sockets in C#? Example of my problem: I have a server with a socket listening on port 5672. TcpListener socket = new TcpListener(localAddr, 5672); socket.Start(); Console.Write("Waiting for a connection... "); // Perform a blocking call to accept requests. TcpClient client = socket.AcceptTcpClient(); Console.WriteLine("Connected to client!"); And i have two clients that will send one byte. Client A send 0x1 and client B send 0x2. From the server side, i read this data like this: Byte[] bytes = new Byte[256]; String data = null; NetworkStream stream = client.GetStream(); while ((stream.Read(bytes, 0, bytes.Length)) != 0) { byte[] answer = new ... stream.Write(answer , 0, answer.Length); } Then client A sends 0x11. I need a way to know that this client is the same that sent "0x1" before.

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  • ASP.NET LINQ to Delete Rows

    - by Tyler
    Dim db As New SQLDataContext Try Dim deleteBoatPics = (From boat In db.Photos Where boat.boatid = id) db.Photos.DeleteOnSubmit(deleteBoatPics) db.SubmitChanges() Catch ex As Exception End Try I'm getting an error that says: Unable to cast object of type 'System.Data.Linq.DataQuery`1[WhiteWaterPhotos.Photo]' to type 'WhiteWaterPhotos.Photo'. I have two separate db.SubmitChanges() because when the button is pressed, I have it delete the records from 1 table, and then the next. I'm lost, can someone help me out?

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  • ASP.NET event handler basic question

    - by anshu
    Hi, I am confused, wanted to confirm the below statement - We can create multiple event handle method for the same event? I think yes, beacuse it is overloading concept? right? Please correct my understanding or advise. Thanks.

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  • ASP.net Create Self re-caching objects?

    - by BlackTea
    How can i make a cached object re-cache it self with updated info when the cache has expired? I'm trying to prevent the next user who request the cache to have to deal with getting the data setting the cache then using it is there any background method/event i can tie the object to so that when it expires it just calls the method it self and self-caches.

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  • Delete rectangle using .NET?

    - by C. Karunarathne
    Can I delete the old rectangle which I have drawn and draw a new rectangle? private void panel1_MouseClick(object sender, MouseEventArgs e) { Graphics g = this.panel1.CreateGraphics(); Pen pen = new Pen(Color.Black, 2); g.DrawRectangle(pen, 100,100, 100, 200); g.dispose(); }

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  • .NET Weird character encoding issue

    - by born to hula
    Our globalization mechanism stores error messages in a SQL 2005 DB. Some of the error messages are used as subjects on email messages sent to the development team. Recently, with no clear reason, we started receiving emails with strangely encoded subjects, such as: =?utf-8?B?Qm1mQm92ZXNwYS5Qb3NUcmFkaW5nRXNwZWNpZmljYWNhbyAtIFN1Y2Vzc28gbm8gcmVwcm 9jZXNzYW1lbnRvLiBEYXRhIFByZWfDo28gPSAzMS8wMy8yMDEwIDAwOjAwOjAwIC0gTsO6bWVyby BkbyBFdmVudG8gZGUgTmVnw7NjaW8gPSAxMDAyIC0gQ8OzZGlnbyBOYXR1cmV6YSBkYSBPcGVyY cOnw6NvID0gQyAtIFNlcn... We don't have any clue on the reason this is happening, nor which encoding pattern is being used here (maybe utf-8?). I'd really appreciate some help.

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  • Adding AllowPartiallyTrustedCallersAttribute To Paypal ASP.NET SDK

    - by snwr
    Currently, I cannot use Paypal Pro on my host (GoDaddy) because it requires Full trust level. After digging in Google, it seems a workaround is possible by adding AllowPartiallyTrustedCallersAttribute to the Paypal assembly. I have seen code samples that use AllowPartiallyTrustedCallersAttribute in their AssemblyInfo.cs file, however, I've yet to run into a code example that also happens to be using PayPal. My question is where should the AllowPartiallyTrustedCallersAttribute be added in my project if my objective is to make the PayPal assembly work? I have tried adding it to my AssemblyInfo.cs for the project that contains the entire website, but I have not been successful. At this point, any insight or shot in the dark would be greatly appreciated. Even if someone could point me in the general direction of some documentation I would be grateful. AllowPartiallyTrustedCallersAttribute Reference: http://msdn.microsoft.com/en-us/library/system.security.allowpartiallytrustedcallersattribute.aspx

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  • ASP.NET MVC and F# Service

    - by Shawn Mclean
    My solution is split into 3 projects. Model, Services and Web. In my Service project, I'd like to use some F# features in it. Is it possible to add mix both F# and C# files in that project (a library[.dll])? If not possible, whats the best way to use 2 separate service projects, one for C# and one for F# and how would I structure these projects?

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  • ASP.NET UpdatePanel > Get selected value from checbox list outside of panel

    - by Rob
    Hi, I have a listing in an UpdatePanel I have some filters for that list in the form a checkboxList control. The checkboxList is created dynamically on page load During the Ajax update (postback), the checkbox list is not populated form the viewstate, so I cannot get the listing to filter. Note: If I put the checkbox list items directly in the markup, it all works, just not if the listing is populated on-postback. protected override void OnLoad(EventArgs e) { if (!Page.IsPostBack) { foreach (var p in global.Product) CheckListManufacurer.Items.Add(new ListItem(p, p)); } base.OnLoad(e); } <form id="ProductListForm" runat="server"> <asp:ScriptManager ID="ScriptManager" runat="server" EnablePartialRendering="true"></asp:ScriptManager> <asp:CheckBoxList ID="CheckListManufacurer" runat="server" EnableViewState="true"> <asp:ListItem Value="" Text="(All)"></asp:ListItem> </asp:CheckBoxList> <asp:Button id="btnTestAjax" runat="server" Text="Test" /> <asp:UpdatePanel ID="ProductsPanel" runat="server" UpdateMode="Conditional"> <Triggers> <asp:AsyncPostBackTrigger ControlID="btnTestAjax" /> <asp:AsyncPostBackTrigger ControlID="CheckListManufacurer" /> </Triggers> <ContentTemplate> <sr:ProductList ID="Products" runat="server" /> </ContentTemplate> </asp:UpdatePanel> </form>

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  • "Add Controller" / "Add View" in a hybrid MVC/WebForms ASP.NET application

    - by orip
    I have an existing WebForms project to which I'm adding MVC pages. I created an MVC project and copied the project type guids. It works fine, but I can't get Visual Studio to display the "Add Controller" or "Add View" wizards on my controllers and views directories (they're not /Controllers and /Views, they're in /Foo/Controllers and /Foo/Views). Is it possible to enable the wizards?

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  • Checkbox control in Asp.Net

    - by Sivakumar
    Hello, Actually I'm trying to capture person's current and permanent address. In this case if d current and permanent address same means no need to enter twise. Here I'm using a checkbox. If d checkbox s checked the current address plased in permanent address too. Help me to do tat.

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  • DirectShow.NET opening any file that Windows Media Player can open

    - by vucetica
    Here is a code snippet from DirectShowNet library, used to open a video file: this.graphBuilder = (IGraphBuilder) new FilterGraph(); // Have the graph builder construct its the appropriate graph automatically hr = this.graphBuilder.RenderFile(filename, null); but the RenderFile method fails. At the same time, Windows Media Player opens the same file nicely. What can be the problem. I got the same behavior without DirectShowNet, but using native C++ code...

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  • Issue Querying LDAP DirectoryEntry in ASP.NET

    - by davemackey
    I have users login to my application via Active Directory and then pull from their AD information to garner information about that user like so: Dim ID as FormsIdentity = DirectCast(User.Identity, FormsIdentity) Dim ticket as FormsAuthenticationTicket = ID.Ticket Dim adDirectory as New DirectoryEntry("LDAP://DC=my,DC=domain,DC=com") Dim adTicketID as String = ticket.Name.Substring(0, 5) Session("people_id") = adDirectory.Children.Find("CN=" & adTicketID).Properties("employeeID").Value Session("person_name") = adDirectory.Children.Find("CN=" & adTicketID).Properties("displayName").Value Now, I want to be able to impersonate other users...so that I can "test" the application as them, so I added a textbox and a button to the page and when the button is clicked the text is assigned to a session variable like so: Session("impersonate_user") = TextBox1.Text When the page reloads I check to see if Session("impersonate_user") has a value other than "" and then attempt to query Active Directory using this session variable like so: If CStr(Session("impersonate_user")) <> "" Then Dim adDirectory as New DirectoryEntry(LDAP://DC=my,DC=domain,DC=com") Dim adTicketID as String = CStr(Session("impersonate_user")) Session("people_id") = adDirectory.Children.Find("CN=" & adTicketID).Properties("employeeID").Value Session("person_name")= adDirectory.Children.Find("CN=" & adTicketID).Properties("displayName").Value Else [use the actual ticket.name to get this info.] End If But this doesn't work. Instead, it throws an error on the first Session line stating, "DirectoryServicesCOMException was unhandled by user code There is no such object on the server." Why? I know I'm giving it a valid username! Is something strange happening in the casting of the session? The code is essentially the same between each method except that in one method rather than pulling from ticket.Name I pull from a session variable for the login I'll be looking up with AD.

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  • ASP.NET MVC- Bizarre problem - suddennly lost all LINQTO SQL data context objects

    - by MikeD
    I was making an edit to a long existing project. Specifically I added some fields to a table and had to delete the table from the LINQTOSQL designer and re-add it. doesn't Also had to do the same for a view. Mode some other code changes and went to build . Now my project won't build because it can't resolve any of the data context objects (all tables and views) in my code. I don't know what I did or how this happeened. I have many tables and views in the project's L2S data context so I don't wont to try and do over. Please any suggestions on how to resolve this problem are greatly appreciated. Desparate! The error messages I am getting are the familiar The type or namespace name 'equipment' could not be found (are you missing a using directive or an assembly reference?)

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  • What is the header of an array in .NET

    - by Thomas
    Hi all, I have a little bit seen the representation of an array in memory with Windbg and SOS plugin. Here it is the c# : class myobj{ public int[] arr; } class Program{ static void Main(string[] args){ myobj o = new myobj(); o.arr = new int[7]; o.arr[0] = 0xFFFFFF; o.arr[1] = 0xFFFFFF; o.arr[2] = 0xFFFFFF; o.arr[3] = 0xFFFFFF; o.arr[4] = 0xFFFFFF; } } I break at final of Main, and I observ : 0:000> !clrstack -l OS Thread Id: 0xc3c (0) ESP EIP 0015f0cc 0043d1cf test.Program.Main(System.String[]) LOCALS: 0x0015f0d8 = 0x018a2f58 0:000 !do 0x018a2f58 Name: test.myobj MethodTable: 0026309c EEClass: 00261380 Size: 12(0xc) bytes (C:\Users\admin\Documents\Visual Studio 2008\Projects\test\test\bin\Debug\test.exe) Fields: MT Field Offset Type VT Attr Value Name 01324530 4000001 4 System.Int32[] 0 instance 018a2f64 tab 0:000 dd 018a2f64 018a2f64 01324530 00000007 00ffffff 00ffffff 018a2f74 00ffffff 00ffffff 00ffffff 00000000 018a2f84 00000000 00000000 00000000 00000000 018a2f94 00000000 00000000 00000000 00000000 018a2fa4 00000000 00000000 00000000 00000000 018a2fb4 00000000 00000000 00000000 00000000 018a2fc4 00000000 00000000 00000000 00000000 018a2fd4 00000000 00000000 00000000 00000000 I can see that the header contains the size of the array (00000007) but my question is : what is the value 01324530 ? Thanks !

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  • asp.net mvc ajax form helper/post additional data

    - by Jopache
    I would like to use the ajax helper to create ajax requests that send additional, dynamic data with the post (for example, get the last element with class = blogCommentDateTime and send the value of that last one to the controller which will return only blog comments after it). I have successfully done so with the help of jQuery Form plugin like so: $(document).ready(function () { $("#addCommentForm").submit(function () { var lastCommentDate = $(".CommentDateHidden:last").val(); var lastCommentData = { lastCommentDateTicks: lastCommentDate }; var formSubmitParams = { data: lastCommentData, success: AddCommentResponseHandler } $("#addCommentForm").ajaxSubmit(formSubmitParams); return false; }); This form was created with html.beginform() method. I am wondering if there is an easy way to do this using the ajax.beginform() helper? When I try to use the same code but replace html.beginform() with ajax.beginform(), when i try to submit the form, I am issuing 2 posts (which is understandable, one being taken care of by the helper, the other one by me with the JS above. I can't create 2 requests, so this option is out) I tried getting rid of the return false and changing ajaxSubmit() to ajaxForm() so that it would only "prepare" the form, and this leads in only one post, but it does not include the extra parameter that I defined, so this is worthless as well. I then tried keeping the ajaxForm() but calling that whenever the submit button on the form gets clicked rather than when the form gets submitted (I guess this is almost the same thing) and that results in 2 posts also. The biggest reason I am asking this question is that I have run in to some issues with the javascript above and using mvc validation provided by the mvc framework (which i will set up another question for) and would like to know this so I can dive further in to my validation issue.

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  • Storing links to internal content pages in ASP.NET MVC

    - by mare
    I'm using a route like this routes.MapRoute( "PageBySlug", RouteType.Regular, "{slug}", new {controller = "Page", action = "Display", slug = "Default"}, null ); to map request to ~/Some-Page-Slug to ~/Page/Display/Some-Page-Slug. When adding content, user can choose to link to existing pages to create references and I then store those links in this format in the datastore: "/Some-Page-Slug". When I run the app in Cassini and pull the link out from datastore and attach it to A tag it looks like this http://localhost:93229/Some-Page-Slug and this link works. But when running the application in virtual directory under some website in IIS, the attached link generates this URL http://localhost/Some-Page-Slug, when it should be http://localhost/virtualdir/Some-Page-Slug. Of course, this generates 404 error. How can I solve this to be universally useful and working under all circumstances? Should I store it differently in the database or should I transform it into correct form in my Views at runtime and how to do that?

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  • Click edit button twice in gridview asp.net c# issue

    - by Supriyo Banerjee
    I have a gridview created on a page where I want to provide an edit button for the user to click in. However the issue is the grid view row becomes editable only while clicking the edit button second time. Not sure what is going wrong here, any help would be appreciated. One additional point is my grid view is displayed on the page only on a click of a button and is not there on page_load event hence. Posting the code snippets: //MY Aspx code <Columns> <asp:TemplateField HeaderText="Slice" SortExpression="name"> <ItemTemplate> <asp:Label ID="lblslice" Text='<%# Eval("slice") %>' runat="server"></asp:Label> </ItemTemplate> <EditItemTemplate> <asp:Label ID="lblslice" Text='<%# Eval("slice") %>' runat="server"></asp:Label> </EditItemTemplate> </asp:TemplateField> <asp:TemplateField HeaderText="Metric" SortExpression="Description"> <ItemTemplate> <asp:Label ID="lblmetric" Text='<%# Eval("metric")%>' runat="server"></asp:Label> </ItemTemplate> <EditItemTemplate> <asp:Label ID="lblmetric" Text='<%# Eval("metric")%>' runat="server"></asp:Label> </EditItemTemplate> </asp:TemplateField> <asp:TemplateField HeaderText="Original" SortExpression="Type"> <ItemTemplate> <asp:Label ID="lbloriginal" Text='<%# Eval("Original")%>' runat="server"></asp:Label> </ItemTemplate> <EditItemTemplate> <asp:Label ID="lbloriginal" Text='<%# Eval("Original")%>' runat="server"></asp:Label> </EditItemTemplate> </asp:TemplateField> <asp:TemplateField HeaderText="WOW" SortExpression="Market"> <ItemTemplate> <asp:Label ID="lblwow" Text='<%# Eval("WOW")%>' runat="server"></asp:Label> </ItemTemplate> <EditItemTemplate> <asp:Label ID="lblwow" Text='<%# Eval("WOW")%>' runat="server"></asp:Label> </EditItemTemplate> </asp:TemplateField> <asp:TemplateField HeaderText="Change" SortExpression="Market" > <ItemTemplate> <asp:Label ID="lblChange" Text='<%# Eval("Change")%>' runat="server"></asp:Label> </ItemTemplate> <EditItemTemplate> <asp:TextBox ID="TxtCustomerID" Text='<%# Eval("Change") %> ' runat="server"></asp:TextBox> </EditItemTemplate> </asp:TemplateField> <asp:CommandField HeaderText="Edit" ShowEditButton="True" /> </Columns> </asp:GridView> //My code behind: protected void Page_Load(object sender, EventArgs e) { } public void populagridview1(string slice,string fromdate,string todate,string year) { SqlCommand cmd; SqlDataAdapter da; DataSet ds; cmd = new SqlCommand(); cmd.CommandType = CommandType.StoredProcedure; cmd.CommandText = "usp_geteventchanges"; cmd.Connection = conn; conn.Open(); SqlParameter param1 = new SqlParameter("@slice", slice); cmd.Parameters.Add(param1); SqlParameter param2 = new SqlParameter("@fromdate", fromdate); cmd.Parameters.Add(param2); SqlParameter param3 = new SqlParameter("@todate", todate); cmd.Parameters.Add(param3); SqlParameter param4 = new SqlParameter("@year", year); cmd.Parameters.Add(param4); da = new SqlDataAdapter(cmd); ds = new DataSet(); da.Fill(ds, "Table"); GridView1.DataSource = ds; GridView1.DataBind(); conn.Close(); } protected void ImpactCalc(object sender, EventArgs e) { populagridview1(ddl_slice.SelectedValue, dt_to_integer(Picker1.Text), dt_to_integer(Picker2.Text), Txt_Year.Text); } protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e) { gvEditIndex = e.NewEditIndex; Gridview1.DataBind(); } My page layout This edit screen appears after clicking edit twice.. the grid view gets displayed on hitting the Calculate impact button. The data is from a backend stored procedure which is fired on clicking the Calculate impact button

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  • ASP.Net Checkbox value at postback is wrong?

    - by Duracell
    We have a checkbox that is initially disabled and checked. It is then enabled on the client side through javascript. If the user then unchecks the box and presses the button to invoke a postback, the state of the checkbox remains as checked on the server side. This is obviously undesirable behaviour. Here is an example. <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="testcb.aspx.cs" Inherits="ESC.testcb" %> <!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 runat="server"> <title></title> </head> <body> <form id="form1" runat="server"> <script type="text/javascript"> function buttonClick() { var cb = document.getElementById('<%= CheckBox1.ClientID %>'); cb.disabled = false; cb.parentNode.disabled = false; } </script> <div> <asp:CheckBox ID="CheckBox1" runat="server" Checked="true" Enabled="false" /> <asp:Button ID="Button1" runat="server" Text="Button" OnClientClick="buttonClick(); return false;" /> <asp:Button ID="Button2" runat="server" Text="Button2" OnClick="button2Click" /> </div> </form> </body> </html> And the Server-side code: using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; namespace ESC { public partial class testcb : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { } protected void button2Click(object sender, EventArgs e) { string h = ""; } } } So we break at the "string h" line and check the value of CheckBox1.Checked. It is true, even if it is unchecked on the form.

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