Best way to repeat a character in C#
What about this: string tabs = new string(‘\t’, n); Where n is the number of times you want to repeat the string. Or better: static string Tabs(int n) { return new string(‘\t’, n); }
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DateTime vs DateTimeOffset
DateTimeOffset is a representation of instantaneous time (also known as absolute time). By that, I mean a moment in time that is universal for everyone (not accounting for leap seconds, or the relativistic effects of time dilation). Another way to represent instantaneous time is with a DateTime where .Kind is DateTimeKind.Utc. This is distinct from … Read more
.NET String.Format() to add commas in thousands place for a number
String.Format(“{0:n}”, 1234); // Output: 1,234.00 String.Format(“{0:n0}”, 9876); // No digits after the decimal point. Output: 9,876
What is the difference between .NET Core and .NET Standard Class Library project types?
When should we use one over the other? The decision is a trade-off between compatibility and API access. Use a .NET Standard library when you want to increase the number of applications that will be compatible with your library, and you are okay with a decrease in the .NET API surface area your library can … Read more
Escape curly brace ‘{‘ in String.Format [duplicate]
Use double braces {{ or }} so your code becomes: sb.AppendLine(String.Format(“public {0} {1} {{ get; private set; }}”, prop.Type, prop.Name)); // For prop.Type of “Foo” and prop.Name of “Bar”, the result would be: // public Foo Bar { get; private set; }
Html.Partial vs Html.RenderPartial & Html.Action vs Html.RenderAction
Html.Partial returns a String. Html.RenderPartial calls Write internally and returns void. The basic usage is: // Razor syntax @Html.Partial(“ViewName”) @{ Html.RenderPartial(“ViewName”); } // WebView syntax <%: Html.Partial(“ViewName”) %> <% Html.RenderPartial(“ViewName”); %> In the snippet above, both calls will yield the same result. While one can store the output of Html.Partial in a variable or return … Read more
How can I get the application’s path in a .NET console application?
System.Reflection.Assembly.GetExecutingAssembly().Location1 Combine that with System.IO.Path.GetDirectoryName if all you want is the directory. 1As per Mr.Mindor’s comment: System.Reflection.Assembly.GetExecutingAssembly().Location returns where the executing assembly is currently located, which may or may not be where the assembly is located when not executing. In the case of shadow copying assemblies, you will get a path in a temp directory. … Read more
How to convert UTF-8 byte[] to string
string result = System.Text.Encoding.UTF8.GetString(byteArray);
LINQ query on a DataTable
You can’t query against the DataTable‘s Rows collection, since DataRowCollection doesn’t implement IEnumerable<T>. You need to use the AsEnumerable() extension for DataTable. Like so: var results = from myRow in myDataTable.AsEnumerable() where myRow.Field<int>(“RowNo”) == 1 select myRow; And as @Keith says, you’ll need to add a reference to System.Data.DataSetExtensions AsEnumerable() returns IEnumerable<DataRow>. If you need … Read more
How to escape braces (curly brackets) in a format string in .NET
For you to output foo {1, 2, 3} you have to do something like: string t = “1, 2, 3″; string v = String.Format(” foo {{{0}}}”, t); To output a { you use {{ and to output a } you use }}. Or now, you can also use C# string interpolation like this (a feature … Read more