check if file is image

Tag: c#,asp.net,asp.net-mvc

I want to check if file is image. and then you will see a link where you can see the image. But the link only has to appear if file is link. I try it like this:

if (!String.IsNullOrEmpty(item.FileName)) {
    var file = item.FileName;
    string[] formats = new string[] { ".jpg", ".png", ".gif", ".jpeg" };
    if (file == null || file.Contains(formats)) {
        viewLink = false;
        @Html.DisplayFor(modelItem => item.FileName)
        <em>(@Resources.Entity.Environment.Removed)</em>
    }
    else {
        @[email protected](modelItem => modelItem.Id )*@
        <a href="@Url.Action("Details", "FormLibrary", new { id = item.FileName})"><i class="fa fa-fw fa-external-link-square text-info"></i></a>
    }
}

But I get this error:

 if (file == null || file.Contains(formats)) {

Best How To :

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))

Aligning StackPanel to top-center in Canvas

c#,wpf,xaml,canvas

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"...

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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...

SettingsProvider class - should it be in DAL or BLL project?

c#,data-access-layer,bll

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...

check if file is image

c#,asp.net,asp.net-mvc

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)) ...

deployment of a site asp.net and iis

c#,asp.net,iis

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c#,xaml,windows-phone

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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...

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c#,xml,foreach

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c#,.net,linq,grid,devexpress

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c#,wpf,binding

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...

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c#,.net,regex,string,replace

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c#,oop,architecture,software-design,code-design

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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

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c#,linq,list,updates

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 =...

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c#,linq

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asp.net,ssl,https

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c#,pervasive

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c#,regex

Just get the dot outside of the captruing group and then make it as optional. @"[+-]?\d+\.?\d*" Use anchors if necessary. @"^[+-]?\d+\.?\d*$" ...

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c#,bouncycastle,portable-class-library

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c#,design-patterns,cqrs,command-query-separation

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c#,xml,linq,xpath,linq-to-xml

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c#,c++,marshalling

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c#,wpf,idataerrorinfo

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c#,mysql

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c#,asp.net,nancy

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...

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c#,sql,sql-server,database

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asp.net,architecture,wcfserviceclient

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c#,xml,linq

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c#,string,immutability,method-chaining

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Index was out of range. Must be non-negative or less than size of collection [duplicate]

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c#,asp.net,active-directory

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...

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c#,.net,visual-studio-2013,.net-framework-version

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c#,xml,xpath,xmldocument,xmlnodelist

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c#,asp.net,sql-server,date,gridview-sorting

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c#,xml

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...

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c#,visual-studio,setup-project

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c#,multithreading,file-search

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c#,reflection,custom-attributes,spring.net

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c#,.net,types,casting

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c#,.net,windows,sendkeys

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c#,.net

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while Inherit style in WPF it affect parent style

c#,xaml,styles,wpf-controls

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...