将数据行返回为自定义类 [英] Return a datarow as a custom class

问题描述

我有：

公共类rowEntry 
 {
 public int idx; 
 public string descr; 
 public string param; 
 
 rowEntry（DataRow dr）
 {
 int.TryParse（dr [0] .ToString（），out idx）; 
 descr = dr [1] .ToString（）; 
 param = dr [2] .ToString（）; 
} 
} 
 

，作为IEnumerable的一部分，想要返回：

 public rowEntry当前
 ... 
 return（rowEntry）tbl.Rows [posn]; 
 ... 

但我无法将DataRow类型转换为rowEntry



我尝试过的事情：



我试过寻找答案但却找不到任何看起来很接近的答案足够

解决方案

所以，这至少可以编译：

 public rowEntry当前
 {
获得
 {
尝试
 {
 rowEntry xre = new rowEntry（tbl.Rows [posn]）; 
返回xre; 
} 
 catch（IndexOutOfRangeException）
 {
抛出新的InvalidOperationException（）; 
} 
} 
} 
 

这是最好的方式吗？

I have:

public class rowEntry
{
    public int idx;
    public string descr;
    public string param;

    rowEntry(DataRow dr)
    {
        int.TryParse(dr[0].ToString(), out idx);
        descr = dr[1].ToString();
        param = dr[2].ToString();
    }
}

and, as part of IEnumerable, want to return:

        public rowEntry Current
...
return (rowEntry)tbl.Rows[posn];
...

but I get cannot convert type DataRow to rowEntry

What I have tried:

I've tried searching for an answer but was unable to find anything that seemed close enough

解决方案

So, this does at least compile:

public rowEntry Current
{
    get
    {
        try
        {
            rowEntry xre = new rowEntry(tbl.Rows[posn]);
            return xre;
        }
        catch (IndexOutOfRangeException)
        {
            throw new InvalidOperationException();
        }
    }
}

is it the best way?

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