从列表框保存到c#Win Form中的.csv文件 [英] Saving from a list box to a .csv file in c# Win Form

问题描述

我已经研究了好几个小时了，我认为最好的主意是为每个循环提出一个，然后将其传递给Stream Writer.

I have been looking around for hours on how to do this, I think the best idea is to come up with a for each loop and then pass that through into the Stream Writer.

我已经尝试了多种不同的方法，并且我认为也许我还不足以看到我的错误，如果有人能够提供帮助的话，那就太好了.

I've tried multiple different ways, and I think maybe I'm just not good enough to see my error, if anyone would be able to help that's be great.

当前已创建文件，并且我得到的唯一输出是第一行上的"System.Windows.Forms.ListBox + ObjectCollection"，这向我暗示我没有正确地传递值.

Currently the file gets created and the only output I get for it is "System.Windows.Forms.ListBox+ObjectCollection" on the first line, which suggests to me that I'm not passing the values out properly.

这是代码:

        private void btnSave_Click(object sender, EventArgs e)
    {
        StreamWriter myOutputStream = new StreamWriter("Myfile.csv");
        myOutputStream.WriteLine(lstBox.Items);
        myOutputStream.Close();
        //foreach (object item in lstBox.Items)
        //string listString = lstBox.SelectedItem.ToString();
        //StreamWriter streamBox = File.CreateText(@"testfile.csv");
        //streamBox.Write(listString);
        //streamBox.Close();
        //if (SaveFileDialog.ShowDialog() == DialogResult.OK)
        //{
        //    System.IO.StreamWriter streamBox = new System.IO.StreamWriter(SaveFileDialog);
        //    foreach (object item in lstBox.Items)
        //        streamBox.WriteLine(item.ToString());
        //    streamBox.Close();
        //}
    }

所有注释掉的部分都是我过去尝试过的东西.但是现在，我认为最简单的方法是前三行.

All the commented out parts are things I've tried in the past. But right now, I think the simplest way was the top three lines.

感谢您的输入.

推荐答案

您正在写出listBox.Items，它是ListBoxObjectCollection.您需要一个foreach循环来编写每个项目:

You are writing out listBox.Items, which is an ListBoxObjectCollection. You need a foreach loop to write each item:

StreamWriter myOutputStream = new StreamWriter("Myfile.csv");

foreach (var item in lstBox.Items)
{
    myOutputStream.WriteLine(item.ToString());
}

myOutputStream.Close();

还请注意，您可以在此处使用using块:

Also note that you can use a using block here:

using (StreamWriter myOutputStream = new StreamWriter("Myfile.csv"))
{
    foreach (var item in lstBox.Items)
    {
        myOutputStream.WriteLine(item.ToString());
    }
}

这篇关于从列表框保存到c#Win Form中的.csv文件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！