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  • Cross Theaded Calls - Many controls Heavy GUI Application after .net 1.1 2.0 upgrade- best way ??

    - by keepsmilinyaar
    I have recently upgraded a .net1.1 solution to .net2.0. AS this is a very heavy GUI appilcation with loads of controls and many multithreaded operations that update the GUI. While these operations worked seamlessly in .net1.1 it is throwing up Cross Threaded Illegal operations after the upgrade. Considering the fact that tehre are numerous grids, buttons and status labels that need to be updated via these multi threaded operations, I decided to code for checking the InvokeRequired solution, however doing that for every control would probably not be the best way to go about it. I was wondering if you could suggest a better way of how I can go about it or propose any OOPS based class structure that I could code around to make the code look better. Please do let me know if my question is unclear. Thanks in advance

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  • Is a control's OnInit called even when attaching it during parent's OnPreRender?

    - by Xerion
    My original understanding was that the asp.net page lifecycle is run once for all pages and controls under normal circumstances. When I attached a control during a container's OnPreRender, I encountered a situation where the control's OnInit was not called. OK, I considered that a bug in my code and fixed as such, by attaching the control earlier. But just today, I encountered a situation where OnInit for a control seems to be called after the normal OnInit has been done for everyone else. See stack below. It seems that during the page's PreRender, the control's OnInit is called as it is being dynamically added. So I just want to confirm exactly what ASP.NET's behavior is? Does it actually keep track of the stage of each control's lifecycle, and upon adding a new control, it will run from the very beginning? [HttpException (0x80004005): The control collection cannot be modified during DataBind, Init, Load, PreRender or Unload phases.] System.Web.UI.ControlCollection.Add(Control child) +8678663 MyCompany.Web.Controls.SetStartPageWrapper.Initialize() MyCompany.Web.Controls.SetStartPageWrapper.OnInit(EventArgs e) System.Web.UI.Control.InitRecursive(Control namingContainer) +333 System.Web.UI.Control.InitRecursive(Control namingContainer) +210 System.Web.UI.Control.AddedControl(Control control, Int32 index) +198 System.Web.UI.ControlCollection.Add(Control child) +80 MyCompany.Web.Controls.PageHeader.OnPreRender(EventArgs e) in System.Web.UI.Control.PreRenderRecursiveInternal() +80 System.Web.UI.Control.PreRenderRecursiveInternal() +171 System.Web.UI.Control.PreRenderRecursiveInternal() +171 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +842

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  • populate checkboxes with database.

    - by amby
    Hi, I have to poulate checkboxes with data coming from database but no checkbox is showing on my page. please give me correct way to do that. in C# file page_load method i m doing this: public partial class dbTest1 : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { string Server = "al2222"; string Username = "hshshshsh"; string Password = "sjjssjs"; string Database = "database1"; string ConnectionString = "Data Source=" + Server + ";"; ConnectionString += "User ID=" + Username + ";"; ConnectionString += "Password=" + Password + ";"; ConnectionString += "Initial Catalog=" + Database; string query = "Select * from Customer_Order where orderNumber = 17"; using (SqlConnection conn = new SqlConnection(ConnectionString)) { using (SqlCommand cmd = new SqlCommand(query, conn)) { conn.Open(); SqlDataReader dr = cmd.ExecuteReader(); while (dr.Read()) { if (!IsPostBack) { Interests.DataSource = dr; Interests.DataTextField = "OptionName"; Interests.DataValueField = "OptionName"; Interests.DataBind(); } } conn.Close(); conn.Dispose(); } } } } and in .aspx using this: <asp:CheckBoxList ID="Interests" runat="server"></asp:CheckBoxList> please tell me correct way to do that.

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  • Retrieve entities with children per one sql call. ADO.NET Entity framework

    - by Andrew Florko
    Hello everybody, I have two tables: A & B B { B1: Field1, B2: Field2, ... } A { Children: List of B, A1: Field1, A2: Field2, } I want to retrieve "A" entities with related "B" entities like this: DataContext.A.Select( a = new MySubset( A1 = a.A1, Children = a.Children.Select(b = b.B1).ToList()); But EF can't translate ToList into SQL, so i have to call ToList() per each instance in query producing additional network call. How can I avoid this? Thank you in advance.

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  • How to store an enum inside a DataColum of a DataTable and show localized text in .Net

    - by SoMoS
    Hello, I have to store on one DataColum of one DataTable an Enum containing some values. De enum is defined as follow: Imports System.ComponentModel Imports System.Globalization Public Enum FirmwareUpdateStatus <Description("updateNotExecuted")> UpdateNotExecuted = 0 <Description("updateSuccess")> UpdateSuccess = 1 <Description("updateError")> UpdateError = 2 End Enum I have also a class called Enum2 that has a method called GetDescription that returns the localized text of an enum value. What I want to do is to show this text into the grid that shows the DataTable but storing the enum value, not the string. How can this be done? Thanks in advance"

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  • .NET Regex - Replace multiple characters at once without overwriting?

    - by Everaldo Aguiar
    I'm implementing a c# program that should automatize a Mono-alphabetic substitution cipher. The functionality i'm working on at the moment is the simplest one: The user will provide a plain text and a cipher alphabet, for example: Plain text(input): THIS IS A TEST Cipher alphabet: A - Y, H - Z, I - K, S - L, E - J, T - Q Cipher Text(output): QZKL KL QJLQ I thought of using regular expressions since I've been programming in perl for a while, but I'm encountering some problems on c#. First I would like to know if someone would have a suggestion for a regular expression that would replace all occurrence of each letter by its corresponding cipher letter (provided by user) at once and without overwriting anything. Example: In this case, user provides plaintext "TEST", and on his cipher alphabet, he wishes to have all his T's replaced with E's, E's replaced with Y and S replaced with J. My first thought was to substitute each occurrence of a letter with an individual character and then replace that character by the cipherletter corresponding to the plaintext letter provided. Using the same example word "TEST", the steps taken by the program to provide an answer would be: 1 - replace T's with (lets say) @ 2 - replace E's with # 3 - replace S's with & 4 - Replace @ with E, # with Y, & with j 5 - Output = EYJE This solution doesn't seem to work for large texts. I would like to know if anyone can think of a single regular expression that would allow me to replace each letter in a given text by its corresponding letter in a 26-letter cipher alphabet without the need of splitting the task in an intermediate step as I mentioned. If it helps visualize the process, this is a print screen of my GUI for the program:

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  • Visual Studio: What approach do you use to 'template' plumbing for similiar projects?

    - by Sosh
    When building ASP.NET projects there is a certain amount of boilerplate, or plumbing that needs to be done, which is often identical across projects. This is especially the case with MVC and ALT.NET approaches. [I'm thinking of things such as: IoC, ORM, Solution structure (projects), Session Management, User Management, I18n etc.] I would like to know what approach you find best for 'reusing' this plumbing accross projects? Have a 'master solution' which you duplicate and rename somehow? (I'm using a this to a degree at the moment, but it's fairly messy. Would be interested how people do this 'better') Mainly rely on Shared Library projects? (I find this appropriate for some things, but too restrictive for things that have to be customised) Code generation tools, such as T4? (Similar to the approach used by SharpArchitecture - have not tried this myself) Something else? Thanks for sharing your experiences!

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  • How do I visualize a complex graph in .Net?

    - by Ivan
    I need to visualize a graph (technically being a set of Entity Framework objects, but I can translate it to another representation if needed) of this kind. I don't know how to name it (by the way, if you know - I'll appreciate if you tell me). It would be ideal for graph elements to be clickable (so that when user clicks on a block, I can handle an event with the element id specified) but I can survive even without any interactivity. Are there any components available good for this task? If no, what should I look for to help me to develop an algorithm for drawing such a graph with visually-comfortable layout?

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  • .NET: Is there a way to finagle a default namespace in an XPath 1.0 query?

    - by Cheeso
    I'm building a tool that performs xpath 1.0 queries on XHTML documents. The requirement to use a namespace prefix in the query is killing me. The query looks like this: html/body/div[@class='contents']/div[@class='body']/ div[@class='pgdbbyauthor']/h2[a[@name][starts-with(.,'Quick')]]/ following-sibling::ul[1]/li/a (all on one line) ...which is bad enough, except because it's xpath 1.0, I need to use an explicit namespace prefix on each QName, so it looks like this: ns1:html/ns1:body/ns1:div[@class='contents']/ns1:div[@class='body']/ ns1:div[@class='pgdbbyauthor']/ns1:h2[ns1:a[@name][starts-with(.,'Quick')]]/ following-sibling::ns1:ul[1]/ns1:li/ns1:a To set up the query, I do something like this: var xpathDoc = new XPathDocument(new StringReader(theText)); var nav = xpathDoc.CreateNavigator(); var xmlns = new XmlNamespaceManager(nav.NameTable); foreach (string prefix in xmlNamespaces.Keys) xmlns.AddNamespace(prefix, xmlNamespaces[prefix]); XPathNodeIterator selection = nav.Select(xpathExpression, xmlns); But what I want is for the xpathExpression to use the implicit default namespace. Is there a way for me to transform the unadorned xpath expression, after it's been written, to inject a namespace prefix for each element name in the query? I'm thinking, anything between two slashes, I could inject a prefix there. Excepting of course axis names like "parent::" and "preceding-sibling::" . And wildcards. That's what I mean by "finagle a default namespace". Is this hack gonna work? Addendum Here's what I mean. suppose I have an xpath expression, and before passing it to nav.Select(), I transform it. Something like this: string FixupWithDefaultNamespace(string expr) { string s = expr; s = Regex.Replace(s, "^(?!::)([^/:]+)(?=/)", "ns1:$1"); // beginning s = Regex.Replace(s, "/([^/:]+)(?=/)", "/ns1:$1"); // stanza s = Regex.Replace(s, "::([A-Za-z][^/:*]*)(?=/)", "::ns1:$1"); // axis specifier s = Regex.Replace(s, "\\[([A-Za-z][^/:*\\(]*)(?=[\\[\\]])", "[ns1:$1"); // predicate s = Regex.Replace(s, "/([A-Za-z][^/:]*)(?!<::)$", "/ns1:$1"); // end s = Regex.Replace(s, "^([A-Za-z][^/:]*)$", "ns1:$1"); // edge case s = Regex.Replace(s, "([-A-Za-z]+)\\(([^/:\\.,\\)]+)(?=[,\\)])", "$1(ns1:$2"); // xpath functions return s; } This actually works for simple cases I tried. To use the example from above - if the input is the first xpath expression, the output I get is the 2nd one, with all the ns1 prefixes. The real question is, is it hopeless to expect this Regex.Replace approach to work, as the xpath expressions get more complicated?

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  • .NET and XML: How can I read nested namespaces (<abc:xyz:name attr="value"/>)?

    - by Entrase
    Suppose there is an element in XML data: <abc:xyz:name attr="value"/> I'm trying to read it with XmlReader. The problem is that I get XmlException that says The ‘:’ character, hexadecimal value 0x3A, cannot be included in a name I have already declared "abc" namespace. I have also tried adding "abc:xyz" and "xyz" namespaces. But this doesn't help at all. I could replace some text before parsing but there may be some more elegant solution. So what should I do? Here is my code: XmlReaderSettings settings = new XmlReaderSettings() NameTable nt = new NameTable(); XmlNamespaceManager nsmgr = new XmlNamespaceManager(nt); nsmgr.AddNamespace("abc", ""); nsmgr.AddNamespace("xyz", ""); XmlParserContext context = new XmlParserContext(null, nsmgr, null, XmlSpace.None); // So this reader can't read <abc:xyz:name attr="value"/> XmlReader reader = XmlReader.Create(path, settings, context);“

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  • String Parameter in url

    - by Ivan90
    Hy Guys, I have to pass in a method action a string parameter, because I want to implement a tags' search in my site with asp.net MVC but everytime in action it is passed a null value. I post some code! I try to create a personal route. routes.MapRoute( "TagsRoute", "Tags/PostList/{tag}", new {tag = "" } ); My RouteLink in a viewpage for each tag is: <% foreach (var itemtags in item.tblTagArt) {%> <%= Html.RouteLink(itemtags.Tags.TagName,"TagsRoute", new {tag=itemtags.Tags.TagName})%>, <% } %> My method action is: public ActionResult PostList(string tag) { if (tag == "") { return RedirectToAction("Index", "Home"); } else { var articoli = artdb.GetArticoliByTag(tag); if (articoli == null) { return RedirectToAction("Index", "Home"); } return View(articoli); } } Problem is value tag that's always null, and so var articoli is always empty! Probably my problem is tag I have to make a route contrainst to my tag parameter. Anybody can help me? N.B I am using ASP.NET MVC 1.0 and not 2.0!

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  • Generated HTML word document not displaying image correctly

    - by spiderdijon
    I'm trying to add an image to a generated html word document that is embedded in a classic ASP page. The code looks something like this: <% Response.ContentType = "application/msword" %> <html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word"> ... <v:shape id="_x0000_s1030" type="#_x0000_t75" style='position:absolute; left:0;text-align:left;margin-left:0;margin-top:17.95pt;width:7in;height:116.85pt; z-index:2;mso-position-horizontal:center;mso-position-horizontal-relative:page; mso-position-vertical-relative:page'> <v:imagedata src="http://xxx/image001.gif" o:title="image001"/> <w:wrap anchorx="page" anchory="page"/> <w:anchorlock/> </v:shape><![endif]--><![if !vml]><span style='mso-ignore:vglayout;position: absolute;z-index:0;left:0px;margin-left:0px;margin-top:24px;width:672px; height:156px'><img width=672 height=156 src="http://xxx/image001.gif" v:shapes="_x0000_s1030"></span><![endif]> The image URL is correct and can be viewed through a browser, however when the word document opens, the image has a red x, with the error message: The image cannot be displayed. Your computer may not have enough memory to open the image, or the image may be corrupted. Restart your computer, and then open the file again. If the red x still appears, you may have to delete the image and then insert it again. If i copy the html code and try to open the word document on my local machine, it displays the image correctly. It just doesn't work when retrieving the document from the server. This happens for any images I try to add. Is there another way to add images to html-generated word documents that can be output from an asp page? Thanks.

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  • Alternatives to LINQ To SQL on high loaded pages

    - by Alex
    To begin with, I LOVE LINQ TO SQL. It's so much easier to use than direct querying. But, there's one great problem: it doesn't work well on high loaded requests. I have some actions in my ASP.NET MVC project, that are called hundreds times every minute. I used to have LINQ to SQL there, but since the amount of requests is gigantic, LINQ TO SQL almost always returned "Row not found or changed" or "X of X updates failed". And it's understandable. For instance, I have to increase some value by one with every request. var stat = DB.Stats.First(); stat.Visits++; // .... DB.SubmitChanges(); But while ASP.NET was working on those //... instructions, the stats.Visits value stored in the table got changed. I found a solution, I created a stored procedure UPDATE Stats SET Visits=Visits+1 It works well. Unfortunately now I'm getting more and more moments like that. And it sucks to create stored procedures for all cases. So my question is, how to solve this problem? Are there any alternatives that can work here? I hear that Stackoverflow works with LINQ to SQL. And it's more loaded than my site.

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  • What's the point of delay signing of an .NET assembly?

    - by smwikipedia
    I noticed that after I use AssemblyDelaySignAttribute to indicate that an assembly is in development and does not need to be signed now, I'll have to use sn -Vr foolib.dll to register for strong name verification to be turned off for this assembly. What's the point of doing this circle? Why not just leave the assembly unsigned until it's fully done? Isn't that less bothering?

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  • What's Wrong With My VB.NET Code Of Windows Forms Application?

    - by Krishanu Dey
    I've to forms frmPrint & frmEmail and a dataset(MyDataset) with some DataTable and DataTable Adapters. In frmPrint I've the following Sub Public Sub StartPrinting() try adapterLettersInSchedules.Fill(ds.LettersInSchedules) adapterLetters.Fill(ds.Letters) adapterClients.Fill(ds.Clients) adapterPrintJobs.GetPrintJobsDueToday(ds.PrintJobs, False, DateTime.Today) For Each prow As MyDataSet.PrintJobsRow In ds.PrintJobs Dim lisrow As MyDataSet.LettersInSchedulesRow = ds.LettersInSchedules.FindByID(prow.LetterInScheduleID) If lisrow.Isemail = False Then Dim clientrow As MyDataSet.ClientsRow = ds.Clients.FindByClientID(prow.ClientID) Dim letterrow As MyDataSet.LettersRow = ds.Letters.FindByID(lisrow.LetterID) 'prow. 'lisrow.is Label1.SuspendLayout() Label1.Refresh() Label1.Text = "Printing letter" txt.Rtf = letterrow.LetterContents txt.Rtf = txt.Rtf.Replace("<%Firstname%>", clientrow.FirstName) txt.Rtf = txt.Rtf.Replace("<%Lastname%>", clientrow.LastName) txt.Rtf = txt.Rtf.Replace("<%Title%>", clientrow.Title) txt.Rtf = txt.Rtf.Replace("<%Street%>", clientrow.Street) txt.Rtf = txt.Rtf.Replace("<%City%>", clientrow.City) txt.Rtf = txt.Rtf.Replace("<%State%>", clientrow.State) txt.Rtf = txt.Rtf.Replace("<%Zip%>", clientrow.Zip) txt.Rtf = txt.Rtf.Replace("<%PhoneH%>", clientrow.PhoneH) txt.Rtf = txt.Rtf.Replace("<%PhoneW%>", clientrow.PhoneW) txt.Rtf = txt.Rtf.Replace("<%Date%>", DateTime.Today.ToShortDateString) Try PDoc.PrinterSettings = printDlg.PrinterSettings PDoc.Print() prow.Printed = True adapterPrintJobs.Update(prow) Catch ex As Exception End Try End If Next prow ds.PrintJobs.Clear() Catch ex As Exception MessageBox.Show(ex.Message, "Print", MessageBoxButtons.OK, MessageBoxIcon.Error) End Try End Sub And in frmEmail i've the Following Sub Public Sub SendEmails() try adapterLettersInSchedules.Fill(ds.LettersInSchedules) adapterLetters.Fill(ds.Letters) adapterClients.Fill(ds.Clients) adapterEmailJobs.GetEmailJobsDueToday(ds.EmailJobs, False, Today) Dim ls_string As String For Each prow As MyDataSet.EmailJobsRow In ds.EmailJobs Dim lisrow As MyDataSet.LettersInSchedulesRow = ds.LettersInSchedules.FindByID(prow.LetterInScheduleID) If lisrow.Isemail = True Then Dim clientrow As MyDataSet.ClientsRow = ds.Clients.FindByClientID(prow.ClientID) Dim letterrow As MyDataSet.LettersRow = ds.Letters.FindByID(lisrow.LetterID) txt.Rtf = letterrow.LetterContents ls_string = RTF2HTML(txt.Rtf) ls_string = Mid(ls_string, 1, Len(ls_string) - 176) If ls_string = "" Then Throw New Exception("Rtf To HTML Conversion Failed") Label1.SuspendLayout() Label1.Refresh() Label1.Text = "Sending Email" If SendEmail(clientrow.Email, ls_string, letterrow.EmailSubject) Then Try prow.Emailed = True adapterEmailJobs.Update(prow) Catch ex As Exception End Try Else prow.Emailed = False adapterEmailJobs.Update(prow) End If End If Next prow Catch ex As Exception MessageBox.Show(ex.Message, "Email", MessageBoxButtons.OK, MessageBoxIcon.Error) End Try End Sub I'm running this two subs using two different Threads. Public th As New Thread(New ThreadStart(AddressOf StartFirstPrint)) Public th4 As New Thread(New ThreadStart(AddressOf sendFirstEmail)) Here is the code of StartFirstPrint and sendFirstEmail Public Sub StartFirstPrint() Do While thCont Try Dim frm As New frmPrint() 'frm.MdiParent = Me frm.StartPrinting() Catch ex As Exception End Try Loop End Sub Public Sub sendFirstEmail() Do While thCont Try Dim frmSNDEmail As New frmEmail frmSNDEmail.SendEmails() Catch ex As Exception End Try Loop End Sub the thCont is a public boolean variable that specifies when to shop those threads. Most Of the time this works very well. But some times it gives errors Like the following image I don't know why is this occurring. Please help me.

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  • What is the best way to convert a hexidecimal string to a byte array (.NET)?

    - by Robert Wagner
    I have a hexidecimal string that I need to convert to a byte array. The best way (ie efficient and least code) is: string hexstr = "683A2134"; byte[] bytes = new byte[hexstr.Length/2]; for(int x = 0; x < bytes.Length; x++) { bytes[x] = Convert.ToByte(hexstr.Substring(x * 2, 2), 16); } In the case where I have a 32bit value I can do the following: string hexstr = "683A2134"; byte[] bytes = BitConverter.GetBytes(Convert.ToInt32(hexstr, 16)); However what about in the general case? Is there a better built in function, or a clearer (doesn't have to be faster, but still performant) way of doing this? I would prefer a built in function as there seems to be one for everything (well common things) except this particular conversion.

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  • xml attribure in dataset

    - by raging_boner
    I want to bind Repeater control to Dataset which is filled with XML data, but i don't know how to show attributes inside repeater. Xml File: <root> <items> <item id="9" name="111111111111" description="111111245" views="1" galleryID="0" /> </items> </root> Repeater code: <asp:Repeater ID="rptrGalleries" runat="server"> <ItemTemplate> <a href='Page?id=<%#DataBinder.Eval(Container.DataItem, "id") %>'><%#DataBinder.Eval(Container.DataItem, "name") %></a> </ItemTemplate> </asp:Repeater> Codebehind: XDocument doc = XDocument.Load(Server.MapPath("~/xml/gallery.xml")); IEnumerable<XElement> items = from item in doc.Descendants("item") orderby Convert.ToDateTime(item.Attribute("lastChanges").Value) descending where int.Parse(item.Attribute("galleryID").Value) == 0 && bool.Parse(item.Attribute("visible").Value) != false select item; DataSet ds = new DataSet(); ds.ReadXml(new StringReader(doc.ToString())); rptrGalleries.DataSource = ds; rptrGalleries.DataBind(); When I compile site I receive this error: System.Web.HttpException: DataBinding: 'System.Data.DataRowView' does not contain a property with the name 'id'.

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  • How to convert a .NET WebService-Method-Result (Soap) into its original datatype?

    - by Marc
    Hello everyone. I have two "identical" webservices (Soap) on two different servers. Don't ask why :-) WebService-1 decides if it handels the request itself or if it passes the request to WebService-2. If so, the response of WebService-2 should directly be returned from WebService-1. The response datatype is complex and self defined. With simple datatypes like 'int or 'string' there would be no problem. The response of WebService-2 is a serialized object (I think it is called "stubs") and theredore it is not possibel to pass this object through as the response of WebService-1 because the type of the objects doesn't match. Is there a simple way to convert the serialised datatype into its original type without buiding a complex converter?

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  • Rich Text Box. .NET 2.0 Content formatting.

    - by Ranjit
    I have a small windows client application data bound to a single table backend. I created a DataSet using the wizard in VS 2005, and it automatically create the underlying adapter and a GridView. I also have a RichText control and bound it to this DataSet. All well so far but, I need to replace certain characters(~) on the fly before the data is shown in the RichTextbox. Can this be done.

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  • .net example of using client certificates in web service call?

    - by Rory
    I'd like to use client certificates to verify the identity of administrative callers to my web service. Then I can issue certificates only to the people I want to call my web service and be pretty sure noone else can call it. This is in a very controlled scenario where only one or two people will get the client certificate, so distribution isn't a hard problem. This article provides a good example of how to call a web service using a client certificate. But how can I check details of the client certificate from within my web service? This old article talks about configuring IIS to do it, but I'd like to do it programmatically within my app. I think? thanks for any suggestions!

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