Data Types in Visual Basic Article 09/15/2021 9 contributors Feedback In this article Declared Data Types See also Thedata typeof a programming element refers to what kind of data it can hold and how it stores that data. Data types apply to all values that can be stored in computer memo...
The following table shows the Visual Basic data types, their supporting common language runtime types, their nominal storage allocation, and their value ranges. Expand table Visual Basic typeCommon language runtime type structureNominal storage allocationValue range Boolean Boolean Depends on implementing...
Interop Considerations.If you are interfacing with components not written for the .NET Framework, for example Automation or COM objects, keep in mind that date/time types in other environments are not compatible with the Visual Basic Date type. If you are passing a date/time argument to such ...
The following table shows the Visual Basic data types, their supporting common language runtime types, their nominal storage allocation, and their value ranges. Expand table Visual Basic typeCommon language runtime type structureNominal storage allocationValue range ...
The two fundamental data types in Visual Basic are value types and reference types. Primitive types (except strings), enumerations, and structures are value types. Classes, strings, standard modules, interfaces, arrays, and delegates are reference types. Every type has a default value. ...
Boolean Data Typevalues are not stored as numbers, and the stored values are not intended to be equivalent to numbers. For compatibility with earlier versions, Visual Basic provides conversion keywords (CType Function,CBool,CInt, and so on) to convert betweenBooleanand numeric types. However, othe...
with components not written for the .NET Framework, for example Automation or COM objects, remember that character types have a different data width (8 bits) in other environments. If you pass an 8-bit argument to such a component, declare it asByteinstead ofCharin your new Visual Basic ...
TestComplete uses data types that are supported by script engines and that are compatible with the VARIANT data type. This data type is used in certain programming languages like Visual Basic and C++. VARIANT is a universal type that can be used to store almost any kind of data: number, ...
例如,Visual Basic 中可用的转换函数将 True 转换为 -1;但是 .NET Framework 中的 System.Convert.ToInt32 方法将 True 转换为 +1。 Integration Services 表达式语言转换为 True -1。 若要避免错误或意外结果,不应编写依赖 True 和False 为特定数值的代码。 如果可能,应将布尔变量的使用限制为与其设计意图...
SQL Server 資料類型 Visual Basic 資料類型 char, varchar, text, nvarchar, ntext String decimal, numeric String bit Boolean binary, varbinary, image 一維Byte() 陣列 int Long smallint Integer tinyint Byte float Double real Single money, smallmoney Currency datetime, smalldatetime Date 設成NULL 的任...