VB]如何在struct中初始化第二个数组 [英] VB] How to initialize 2nd array in struct

问题描述

您好。



初始化阵列的地方出错。



怎么样我使用那个数组？



它必须是一个二维数组的字符...



谢谢。

Hello.

An error occurs in the place to initialize the array.

How Can I Use that array ?

It must be a two-dimensional array of character...

Thank you.

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Ansi, Pack:=1)> _
Public Structure ST_TEST
    <MarshalAs(UnmanagedType.ByValArray, SizeConst:=360)>
    Public 2D_CHAR_ARR()() As Char  '//Array In Struct can not be fixed row&col
End Structure

''''''''''''''''''''''''''''''''''''''''

Dim stTest As ST_TEST
ReDim stTest.2D_CHAR_ARR(60)(60)   ' //throws System.NullReferenceException

推荐答案

你永远不会初始化数组，这就是为什么redim会抛出异常。我想你不需要锯齿状阵列。试试这个：

You never initialize the array, that's why redim will throw and exception. And i guess you don't need the jagged array. try this:

Public Structure ST_TEST
    Public _2D_CHAR_ARR(,) As Char '2D array
End Structure

Dim stTest As ST_TEST
stTest._2D_CHAR_ARR = New Char(60, 60) {} ' here you create the array

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