从数组创建标签 [英] Create labels from array

问题描述

我想基于数组创建标签，但是我总是只得到一个标签.

I want to create labels based on an array, but i always get only one label.

private void button1_Click(object sender, EventArgs e)
{
    Debug.WriteLine(hardrive.GetHardDriveName.Count);
    Label[] lblHDDName = new Label[hardrive.GetHardDriveName.Count];

    for (int i = 0; i < hardrive.GetHardDriveName.Count; i++)
    {
        int x = 10;
        int y = 10;

        lblHDDName[i] = new Label();
        lblHDDName[i].Location = new System.Drawing.Point(x, y);
        lblHDDName[i].Text = "Test";
        groupBoxHDD.Controls.Add(lblHDDName[i]);

        y += 10;
    }
}

调试

Debug.WriteLine(hardrive.GetHardDriveName.Count);

在数组中显示两个项目.

Shows two items in the array.

问题在于，GroupBox中只有一个标签，而不是两个.

The problem is that in the GroupBox there is only one label instead of two.

推荐答案

您的y变量是在for循环中定义的，而不是在外部定义的.因此，对于循环的每次执行，都将其初始化为10并在System.Drawing.Point中使用它.如果要跟踪循环结束时完成的增量，则必须在for循环之前声明并初始化y.

Your y variable is defined in the for loop, not outside. Therefore, for each execution of the loop, you initialize it to 10 and use it in your System.Drawing.Point. If you want to keep track of the increment done at the end of the loop, you must declare and initialize y before the for loop.

int y = 10;
for (int i = 0; i < ...; i++)
{
   // use y
   ...

   // increment it
   y += 10;
}

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