option-strict

VB.NET: Which As clause to use with anonymous type with Option Strict On?

由 可紊 提交于 2019-12-11 03:04:44
问题 Consider the requirement to always declare Option Strict On . We'll always need to declare variables with the As keyword. What would be the type of an anonymous type? Example : Dim product As ... = New With { Key .Name = "paperclips", .Price = 1.29 } What will follow the As ? 回答1: try either setting Option Infer On at the top of the class or a project level 回答2: Add an Option Infer On statement, then you don't use As. If you don't use Option Infer On, product will be of type Object (but you'd

Linq query has an implicit cast error for DataGridViewRow when option strict is enabled

由 断了今生、忘了曾经 提交于 2019-12-02 12:00:43
问题 I have a DataGridView that is bound to a list of objects called "BaseChange". The BaseChange objects are made up of 4 properties... ChangeType ChangeStatus ChangeDescription LastChangeDate The datagridview has columns for all 4 values as well as a 5th (a checkbox column called "colIsSelected"). There is no problem binding the list to the grid and displaying the items. The problem is that the query that gets the selected items in the grid is giving me an implicit cast error when option strict

VB.NET Turning Option Strict Off In-Line

由 别等时光非礼了梦想. 提交于 2019-11-29 09:10:42
Is there a way to turn option strict off for just a single line of code? I'm doing some maintenance work and I need to "cheat" in just one place and I don't want to lower the standard for the entire file. Sadly, it is not possible for a single line of code in a file. See the MSDN docs . On the other hand, you could probably make your single line of code a separate function, put that in a new file with partial class attributes, and put Option Strict Off on that one file. The IL compiler will probably inline your function anyway, so it will be equivalent speedwise, but will be ugly from a

Enforce datatypes passed to methods (Option Strict)

由 北战南征 提交于 2019-11-28 14:35:28
I am using VS2005 to maintain some vb.net code. I am preparing to update to newer toolsets and am doing code cleanup first. I am cleaning up all the compile error messages, but I noticed that I do not get a warning if I pass a String to a function that is expecting an Integer. How can I force that warning? The specific situation is that I am changing this code: Public Function MyFunc(ByVal MyVar) to Public Function MyFunc(ByVal MyVar As Integer) And I want to find all the places that were NOT passing in an Integer. Selectively Turn on Option Strict Add to the top of the code file: Option

What is the best way to mix VB.NET's Option Strict and the new Option Infer directives?

由 安稳与你 提交于 2019-11-28 13:24:27
In a related question , my team is about to (hopefully) start using LINQ, and I'd like to take advantage of anonymous types. What is the best way to mix VB.NET's Option Strict (which we've been using through the life of the project) and the new Option Infer directives? Option Strict and Option Infer do not conflict, so I see no harm in having both on. As a style guide, I prefer to put Option Strict, Explicit, and Infer at the top of each class file - this prevents differences in project or IDE settings from causing issues, and makes it clear what settings are used. Option Strict can be used

VB.NET Turning Option Strict Off In-Line

由 末鹿安然 提交于 2019-11-28 02:34:44
问题 Is there a way to turn option strict off for just a single line of code? I'm doing some maintenance work and I need to "cheat" in just one place and I don't want to lower the standard for the entire file. 回答1: Sadly, it is not possible for a single line of code in a file. See the MSDN docs. On the other hand, you could probably make your single line of code a separate function, put that in a new file with partial class attributes, and put Option Strict Off on that one file. The IL compiler

Enforce datatypes passed to methods (Option Strict)

由 半世苍凉 提交于 2019-11-27 08:49:28
问题 I am using VS2005 to maintain some vb.net code. I am preparing to update to newer toolsets and am doing code cleanup first. I am cleaning up all the compile error messages, but I noticed that I do not get a warning if I pass a String to a function that is expecting an Integer. How can I force that warning? The specific situation is that I am changing this code: Public Function MyFunc(ByVal MyVar) to Public Function MyFunc(ByVal MyVar As Integer) And I want to find all the places that were NOT

What is the best way to mix VB.NET's Option Strict and the new Option Infer directives?

由 社会主义新天地 提交于 2019-11-27 07:39:26
问题 In a related question, my team is about to (hopefully) start using LINQ, and I'd like to take advantage of anonymous types. What is the best way to mix VB.NET's Option Strict (which we've been using through the life of the project) and the new Option Infer directives? 回答1: Option Strict and Option Infer do not conflict, so I see no harm in having both on. As a style guide, I prefer to put Option Strict, Explicit, and Infer at the top of each class file - this prevents differences in project

Option Strict on by default in VB.NET

由 非 Y 不嫁゛ 提交于 2019-11-26 07:49:47
问题 Whenever I created a new VB.NET program I must go into the project\'s properties and set \'Option strict\' on. Can I do that once so it is a default for every time I create a new project? 回答1: In Visual Studio, go menu Tools -> Options -> Projects and Solutions -> VB defaults -> Option Strict . Set it to "On". Every time you create a new project, it will have Option Strict On by default. 回答2: Check out Option Strict under menu Tools -> Options -> Projects and Solutions -> VB Defaults : 回答3:

VB.NET equivalent for C# 'dynamic' with Option Strict On

由 拈花ヽ惹草 提交于 2019-11-26 01:47:34
问题 Is there an equivalent for the C# 4 \'dynamic\' keyword when using type safe VB.NET, i.e. with Option Strict On ? 回答1: The equivalent is Object in VB.NET but with Option Strict Off . With Option Strict On there's no equivalent. Put another way the dynamic keyword brings Option Strict Off equivalent functionality to C#. 回答2: VB.NET always had the "dynamic" feature built in, originally called late binding. This syntax was supported forever: Dim obj = new SomeComClass() obj.DoSomething() Worked
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