directcast

'objType' is not defined… Actually, it is, so why is this happening?

一笑奈何 提交于 2019-12-30 11:19:08
问题 As you seen in this picture below, for some reason my DirectCast wont except ANYTHING for the second argument. It says it requires a type, but, it won't take any object at all! Thanks for any help! I'm using VB.net so all .net answers are acceptable :) EDIT Ok, so apparently I'm not giving it the right kind of type . Could somebody please clarify this? Assuming the type it needs to cast to is gridElement , what should I replace objType with? 回答1: DirectCast requires an object prototype (i.e.

C#'s equivalent to VB.NET's DirectCast?

岁酱吖の 提交于 2019-11-28 19:05:37
Does C# have an equivalent to VB.NET's DirectCast? I am aware that it has () casts and the 'as' keyword, but those line up to CType and TryCast. To be clear, these keywords do the following; CType/() casts : If it is already the correct type, cast it, otherwise look for a type converter and invoke it. If no type converter is found, throw an InvalidCastException. TryCast/"as" keyword : If it is the correct type, cast it, otherwise return null. DirectCast : If it is the correct type, cast it, otherwise throw an InvalidCastException. After I have spelled out the above, some people have still

C#'s equivalent to VB.NET's DirectCast?

三世轮回 提交于 2019-11-27 11:52:46
问题 Does C# have an equivalent to VB.NET's DirectCast? I am aware that it has () casts and the 'as' keyword, but those line up to CType and TryCast. To be clear, these keywords do the following; CType/() casts : If it is already the correct type, cast it, otherwise look for a type converter and invoke it. If no type converter is found, throw an InvalidCastException. TryCast/"as" keyword : If it is the correct type, cast it, otherwise return null. DirectCast : If it is the correct type, cast it,

Casting DataTypes with DirectCast, CType, TryCast

*爱你&永不变心* 提交于 2019-11-27 07:12:47
Ever since I moved from VB6 to VB.NET somewhere in 2005, I've been using CType to do casting from one data type to another. I do this because it is simply faster to type, used to exist in VB6 and I do not know why I have to be using DirectCast if there is apparently no difference between them. I use TryCast once in a while because I understand that sometimes casting can fail. I however cannot get the difference between CType and DirectCast. Can anyone tell me the difference in plain simple English what the difference the two (CType and DirectCast)? Adding examples of where to use what as well

Difference between DirectCast() and CType() in VB.NET

好久不见. 提交于 2019-11-26 17:20:40
I am an experienced C/C++/C# programmer who has just gotten into VB.NET. I generally use CType (and CInt, CBool, CStr) for casts because it is fewer characters and was the first way of casting which I was exposed to, but I am aware of DirectCast and TryCast as well. Simply, are there any differences (effect of cast, performance, etc.) between DirectCast and CType? I understand the idea of TryCast. Joel Coehoorn The first thing to note is that VB.NET does not have a direct analog to C#'s (type)instance casting mechanism. I bring that up because it's useful to use that as a starting point in

Casting DataTypes with DirectCast, CType, TryCast

99封情书 提交于 2019-11-26 13:04:38
问题 Ever since I moved from VB6 to VB.NET somewhere in 2005, I\'ve been using CType to do casting from one data type to another. I do this because it is simply faster to type, used to exist in VB6 and I do not know why I have to be using DirectCast if there is apparently no difference between them. I use TryCast once in a while because I understand that sometimes casting can fail. I however cannot get the difference between CType and DirectCast. Can anyone tell me the difference in plain simple

Difference between DirectCast() and CType() in VB.NET

落花浮王杯 提交于 2019-11-26 05:21:31
问题 I am an experienced C/C++/C# programmer who has just gotten into VB.NET. I generally use CType (and CInt, CBool, CStr) for casts because it is fewer characters and was the first way of casting which I was exposed to, but I am aware of DirectCast and TryCast as well. Simply, are there any differences (effect of cast, performance, etc.) between DirectCast and CType? I understand the idea of TryCast. 回答1: The first thing to note is that VB.NET does not have a direct analog to C#'s (type)instance