Can logging to text file in ASP.net WEb server cause locks
Thi is my code:
var outStream = new FileStream(Server.MapPath("~\\bin\\error.txt"), FileMode.Append, FileAccess.Write, FileShare.ReadWrite);
As you see FileShare is both read and write.
So far I have not seen any issues. Are you aware of possible issues using this method. (I do not want to log error to windows event)
Not 100% sure I understand what you are asking, but any time something writes to a file, the file is locked by that application for the period of time that it takes to complete the write. If there is another application writing to the same file at times, there will be the potential for conflict. If both applications are coded to handle conflicts of this nature, then all will be fine. So if you are coding to handle this situation, you would put the write method in a TRY block within a WHILE block. If an error occurs writing, then it would stay in the while block and pause for a second or something and then try again. Once the write is successful, break out of the while block. You may also want to put in a counter and limit the number of tries.
Just be aware that if you do this that the thread will sit here until the write is successful, so if you don't want this to hold up your application it needs to be done with another thread.
c#,asynchronous,task,cancellationtokensource,cancellation-token
Cancellation in .Net is cooperative. That means that the one holding the CancellationTokenSource signals cancellation and the one holding the CancellationToken needs to check whether cancellation was signaled (either by polling the CancellationToken or by registering a delegate to run when it is signaled). In your Task.Run you use the...
Just get the dot outside of the captruing group and then make it as optional. @"[+-]?\d+\.?\d*" Use anchors if necessary. @"^[+-]?\d+\.?\d*$" ...
c#,asp.net,.net,entity-framework,entity-framework-6
You are executing an asynchronous method. This means that any exceptions will be thrown when you call await on the returned task or when you try to retrieve the results using await myTask; You never do so, which means that the exception is thrown and caught higher up your call...
When connecting to a MySQL-Database I always used the MySQL Connector you can get here: https://dev.mysql.com/downloads/connector/net/6.9.html You have to import the MySQL namespaces to your project and then you can use the MySQLConnection instead of the SQLConnection that is, as far as I know, only for MSSQL servers. http://www.codeproject.com/Tips/423233/How-to-Connect-to-MySQL-Using-Csharp...
You want create relationship in two table Refer this link http://www.c-sharpcorner.com/Blogs/5608/create-a-relationship-between-two-dataset-tables.aspx...
I managed to get it working using an IMultiValueConverter like this: public class BorderCollectionConverter : IMultiValueConverter { public object Convert(object[] values, Type targetType, object parameter, System.Globalization.CultureInfo culture) { var borderCollection = new BorderCollection(); borderCollection.AddRange(values.OfType<Border>()); return borderCollection; } public object[] ConvertBack(object value, Type[] targetTypes, object parameter, System.Globalization.CultureInfo culture) { throw new...
The module- and application pipelines are explained in detail in the wiki. It's basically hooks which are executed before and after route execution on a global (application pipelines) and per-module basis. Here's an example: If a route is resolved to a module called FooModule, the pipelines will be invoked as...
I believe you need to use: SendKeys.SendWait("^(s)"); Instead of: SendKeys.SendWait("^%s?"); Have a look at https://msdn.microsoft.com/en-us/library/system.windows.forms.sendkeys.send(v=vs.110).aspx for more information....
If you don't want any input or hit testing on a certain element you should set the IsHitTestVisible property to false: <Grid> <Canvas Name="Canvas" Background="#EFECCA"> <DockPanel VerticalAlignment="Stretch" HorizontalAlignment="Stretch" Width="{Binding ActualWidth, ElementName=Canvas}" Height="{Binding ActualHeight, ElementName=Canvas}" MouseLeftButtonDown="DockPanel_MouseLeftButtonDown" TouchDown="DockPanel_TouchDown" Panel.ZIndex="2" Background="Transparent"> </DockPanel> <Button Width="50" Height="50"...
c#,asp.net,asp.net-mvc,json.net
Does the assemblyBinding tag have proper xmlns schema? Check if the issue you are encountering is same as Assembly binding redirect does not work
c#,oop,architecture,software-design,code-design
Place a UserControl on each tab.
Is "User Info" and "Course Data" is a different entity. If it is so, I think you may encapsulate them in one entity. XmlTextWriter writer = new XmlTextWriter(path, System.Text.Encoding.UTF8); writer.WriteStartDocument(true); writer.Formatting = Formatting.Indented; writer.Indentation = 4; writer.WriteStartElement("My Entity"); /* It is a biggest one*/ writer.WriteStartElement("User Info"); writer.WriteStartElement("Name"); writer.WriteString(userName); writer.WriteEndElement(); writer.WriteStartElement("Tutor...
Sure, assuming you are using IIS to host your site, open IIS Manager and select your web site and then binding on the right: make sure you only have a binding for https not for http. This way IIS will only send https traffic to that web site. Edit: What...
I don't agree that there is a right layer for you to put that class since you reading values from the config file based on keys provided and it can be needed by one or all of the layers. In the case of all layers using this class, you can...
If you declare a Style without an x:Key, it will override the default style for that control. <Style TargetType="local:CustomControl"> So the code above will effect all CustomControl elements throughout the entire application (or within the scope). If you do not want to override the base style, you can give your...
There are several domain providers like: godaddy, name etc you can use to buy a domain name. These providers also provide you steps to map the domain name to your website. Check out this link for example. This link explains domain name configuration in details.
c#,reflection,custom-attributes,spring.net
If you have obtained the Assembly, you can just iterate over the types and check for your conditions: var matchingTypes = from t in asm.GetTypes() where !t.IsInterface && !t.IsAbstract where typeof(ICustomInterface).IsAssignableFrom(t) let foo = t.GetCustomAttribute<FooAttribute>() where foo != null && foo.Bar == Y select t; I am assuming you want...
Change this: [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 36)] private string iu; to this: [MarshalAs(UnmanagedType.LPStr)] private string iu; Note that this code is good only to pass a string in the C#->C++ direction. For the opposite direction (C++->C#) it is more complex, because C# can't easily deallocate C++ allocated memory. Other important thing:...
It looks like you have a typo in your loop condition: for (int index = filePaths.Count(); filePaths.Count() > 9; index--) It should be for (int index = filePaths.Count() - 1; index > 9; index--) Also note that for the first iteration of loop you're trying to access filePaths[filePaths.Count()] which is...
No, there is no way to export data programmatically through the "Export Data" wizard in the Pervasive Control Center. You would need to either write or have written an export module.
c#,bouncycastle,portable-class-library
Try like this for HmacSha256 public class HmacSha256 { private readonly HMac _hmac; public HmacSha256(byte[] key) { _hmac = new HMac(new Sha256Digest()); _hmac.Init(new KeyParameter(key)); } public byte[] ComputeHash(byte[] value) { if (value == null) throw new ArgumentNullException("value"); byte[] resBuf = new byte[_hmac.GetMacSize()]; _hmac.BlockUpdate(value, 0, value.Length); _hmac.DoFinal(resBuf, 0); return resBuf; }...
Simple example for using a non-anonymous class. public class MyLovelyClass { public Int32 Number { get; set; } public bool Selection { get; set; } } var packs = from r in new XPQuery<Roll>(session) select new MyLovelyClass() { Number = r.number }; gcPack.DataSource = packs; ...
You can use a StringFormat in your binding, like so: <TextBox Text="{Binding ItemName, StringFormat={}Item: {0}}"/> That being said, it may cause some unexpected behavior when editing. For example, if the user edits only the item name (excluding the 'Item:' text), then when the TextBox loses focus, the string format will...
You need to use "India Standard Time" instead of "Indian". Please refer to this link for a list of the time zone descriptions.
c#,visual-studio,setup-project
You can use a Microsoft Setup project or WIX (easily integrate with Visual Studio). Both are free. •You can do almost all of your customization in setup project by adding custom actions. •WIX (window installer xml) is the better option. You can do a complete customization from wix but it...
The compiler sees the T2 and T identifiers and helpfully informs you that those types seem unrelated. That's absolutely correct, as they have no relation: there are no generic constraints that would assert any relations between them (I'm not saying that would be useful here though :) ). Whether this...
try this: var loginName = @"loginNameOfInterestedUser"; var ldap = new DirectoryEntry("LDAP://domain.something.com"); var search = new DirectorySearcher(ldap) { Filter = "(&(objectCategory=person)(objectClass=user)(sAMAccountName=" + loginName + "))" }; var result = search.FindOne(); if (result == null) return; var fullQuery = result.Path; var user = new DirectoryEntry(fullQuery); DirectoryEntry manager; if (user.Properties.PropertyNames.OfType<string>().Contains("manager")) { var managerPath...
You can ignore pretty much all your code, the issue is just this: XDocument people = new XDocument("Persons"); You can't create an XDocument containing a string, you need to add an element: XDocument people = new XDocument( new XElement("Persons", original.XPathSelectElements(xpathFilterDups))); ...
c#,asp.net,sql-server,date,gridview-sorting
What happens if you change all of the filters to use 'LIKE': if (DropDownList1.SelectedValue.ToString().Equals("Start")) { FilterExpression = string.Format("Start LIKE '{0}%'", TextBox1.Text); } Then, you're not matching against an exact date (at midnight), but matching any date-times which start with that date. Update Or perhaps you could try this... if (DropDownList1.SelectedValue.ToString().Equals("Start"))...
I would do something like this: (for ordinairy lists) // the current list var currentList = new List<Employee>(); currentList.Add(new Employee { Id = 154, Name = "George", Salary = 10000 }); currentList.Add(new Employee { Id = 233, Name = "Alice", Salary = 10000 }); // new list var newList =...
Make a base class which will have id,x,y,z, and have Vendors,Bankers and Hospitals extend it. Then you can have a collection of the base class, and add to it the classes that inherit from it....
Yep, you need to do the adding within the loop. I'd use a List<string> as it supports LINQ: XmlNodeList skillNameNodeList=SkillXML.GetElementsByTagName("name"); List<string> skills = new List<string>(); foreach (XmlNode skillNameNode in skillNameNodeList) { skills.Add(skillNameNode.Attributes["value"].Value); } ...
Anonymous types do not provide operator overloads for ==, although it wouldn't matter in this case since one of the arguments is typed object. However the C# compiler does provide Equals, GetHashCode, and ToString implementations. Use the static object.Equals, method which will do the appropriate null checks and then call...
Declare it as a known type (not an anonymous type), like this for example: Dictionary<int, string> results = new Dictionary<int, string>(); Then you could store the results in the Dictionary: results = behzad.GAPERTitles.ToDictionary(x => x.id, x => x.gaptitle); And reference it later: private void button1_Click(object sender, EventArgs e) { //...
You can't do this: string.Contains(string array) Instead you have to rewrite that line of code to this: if (file == null || formats.Any(f => file.Contains(f))) And this can be shortened down to: if (file == null || formats.Any(file.Contains)) ...
asp.net,architecture,wcfserviceclient
As long as you are able to use the exact same contract for all the versions the web application does not need to know which version of the WCF service it is accessing. In the configuration of the web application, you specify the URL and the contract. However, besides the...
c#,design-patterns,cqrs,command-query-separation
In such scenario I usually go with generating new entity Ids on the client. Like this: public class ProductController: Controller{ private IProductCommandService commandService; private IProductQueryService queryService; private IIdGenerationService idGenerator; [HttpPost] public ActionResult Create(Product product){ var newProductId = idGenerator.NewId(); product.Id = newProductId; commandService.AddProduct(product); //TODO: add url parameter or TempData key to...
c#,xml,xpath,xmldocument,xmlnodelist
If you're happy to convert it into LINQ to XML, it's really simple: XDocument original = ...; // However you load the original document // Separated out for clarity - could be inlined, of course string xpath = "//Person[not(PersonID = following::Person/PersonID)]" XDocument people = new XDocument( new XElement("Persons", original.XPathSelectElements(xpath) )...
You can implement your OptionalPhoneAttribute based on the original PhoneAttribute: public sealed class OptionalPhoneAttribute : ValidationAttribute { public override bool IsValid(object value) { var phone = new PhoneAttribute(); //return true when the value is null or empty //return original IsValid value only when value is not null or empty return...
Instead of using ordinary foreach statement in doing your search, you should use parallel linq. Parallel linq combines the simplicity and readability of LINQ syntax with the power of parallel programming. Just like code that targets the Task Parallel Library. This will shield you from low level thread manipulation and...
c#,string,immutability,method-chaining
Is it true that when you chain string functions, every function instantiates a new string? In general, yes. Every function that returns a modified string does so by creating a new string object that contains the full new string which is stored separately from the original string. There are...
c#,.net,visual-studio-2013,.net-framework-version
The targeted .NET version is the only version that the app will depend upon by default. Visual Studio will not automatically add higher and backwards compatible releases. Do this manually by adding other .NET versions to a configuration file: On the Visual Studio menu bar: Choose Project; Add New Item;...