LINQ:无法隐式转换类型'System.Collections.Generic.IEnumerable< int>' 'int' [英] LINQ: Cannot implicitly convert type 'System.Collections.Generic.IEnumerable<int>' to 'int'

问题描述

我从以下代码中得到一个错误:

I get an error from the following code:

int dreamX[];

private void Form1_Load(object sender, EventArgs e)
{ 
    sumX();
}

private void sumX()
{
    for (var i = 0; i < 8; i++)
    {
        dreamX[i] =
            from Control control in Controls
            where
                control.GetType() == typeof(TextBox)
                && control.Name.StartsWith("box")
            select Convert.ToInt32(((TextBox)control).Text);
    }
}

我遇到此错误，如何进行显式转换.

I'm getting this error, how do explicit convert this.

无法将类型'System.Collections.Generic.IEnumerable -int-'隐式转换为'int'""

"Cannot implicitly convert type 'System.Collections.Generic.IEnumerable -int-' to 'int'"

推荐答案

您想要的是什么

int[] dreamX;
private void Form1_Load(object sender, EventArgs e)
        { 
         sumX();
        }
 private void sumX()
        {
                dreamX =( from Control control in Controls                  
                         where control.GetType() == typeof(TextBox) &&
                               control.Name.StartsWith("box")
                         select Convert.ToInt32(((TextBox)control).Text))
                                       .ToArray();             
        }

from子句产生IEnumerable 集合.您可以将其转换为扩展名为.ToArray()的数组

The from clause produces a IEnumerable collection. You can convert this to an array with the .ToArray() extension

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