首页 \ 问答 \ 在Visual Studio的Watch窗口中使用LINQ表达式(Using LINQ expressions in Visual Studio's Watch window)

在Visual Studio的Watch窗口中使用LINQ表达式(Using LINQ expressions in Visual Studio's Watch window)

我在程序中有一个byte []变量,例如:

byte[] myByteArray = new byte[] { 0xF0, 0x0F };

调试此程序时,我想在Visual Studio的Watch窗口中将字节数组内容显示为单独的十六进制值。

所以我尝试在Watch Window中使用以下LINQ表达式,但没有成功:

myByteArray.Select(value => value.ToString("X2")).ToArray()

观察窗口的错误消息:

错误CS1061:'byte []'不包含'Select'的定义,并且没有扩展方法'Select'接受类型'byte []'的第一个参数可以找到(你是否缺少using指令或汇编引用? )

有没有人知道是否有办法在Visual Studio的Watch窗口中使用LINQ表达式而不安装第三方扩展?

我现在正在使用VS2017 15.6.6。

编辑:此问题的屏幕截图...

在此处输入图像描述


I have a byte[] variable in program, e.g.:

byte[] myByteArray = new byte[] { 0xF0, 0x0F };

When debugging this program, I wanted to display the byte array content as individual hexadecimal values inside Visual Studio's Watch window.

So I tried to use the following LINQ expression in the Watch Window, without success:

myByteArray.Select(value => value.ToString("X2")).ToArray()

Watch window's error message:

error CS1061: 'byte[]' does not contain a definition for 'Select' and no extension method 'Select' accepting a first argument of type 'byte[]' could be found (are you missing a using directive or an assembly reference?)

Does anyone know if there is a way to use LINQ expressions in Visual Studio's Watch window without installing third-party extensions?

I'm using VS2017 15.6.6 at this moment.

Edit: A screenshot of this issue...

enter image description here


原文:https://stackoverflow.com/questions/49996480
更新时间:2023-10-08 20:10

最满意答案

您应该用eval替换assignin ,因为assignin在调用函数调用returns_ext或基础工作区时分配。 请参阅下面的简单示例:

function test
newData1.prices = 1;
newData1.dates = 2;

variables = {'prices','dates'};
for i = 1:length(variables) 
    temp = newData1.(variables{i});
    eval([variables{i} ' = temp;']);
end

disp(prices)
disp(dates)

You should replace assignin by eval, since assignin assigns either in the caller function calling returns_ext or the base workspace. See the simple example below:

function test
newData1.prices = 1;
newData1.dates = 2;

variables = {'prices','dates'};
for i = 1:length(variables) 
    temp = newData1.(variables{i});
    eval([variables{i} ' = temp;']);
end

disp(prices)
disp(dates)

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