C# 将列表框的项目保存到文本文件
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Saving the items of a listbox to a text file
提问by roller
How can I save the contents of my listboxitems to a text file using a SaveFileDialog?
如何listbox使用SaveFileDialog? 将项目的内容保存到文本文件中？
I also want to add additional information to the text file and also add a MessageBoxsaying saved when it's been successful.
我还想在文本文件中添加其他信息，并添加MessageBox成功时保存的说法。
回答by Asad
To Save
保存
// fetch the selected Text from your list
string textToRight = listBox1.SelectedItem.ToString();
// Write to a file
StreamWriter sr = File.CreateText(@"testfile.txt");
sr.Write(textToRight);
sr.Close();
Message
信息
// display Message
MessageBox.Show( "Information Saved Successfully" );
回答by Tanzelax
A SaveFileDialogis used with ShowDialog()to show it to the user, and if it's successful, using its OpenFile()to get the (File)Streamthat you write to. There's an example on the msdn page.
ASaveFileDialog用于将ShowDialog()其显示给用户，如果成功，则使用它OpenFile()来获取Stream您写入的（文件）。msdn 页面上有一个示例。
A ListBoxcan be accessed through its Itemsproperty, which is simply a collection of the items on it.
AListBox可以通过它的Items属性访问，它只是它上面的项目的集合。
回答by Paul Kohler
You have a few things going on there - make sure you split them up, e.g.
你有一些事情在那里 - 确保你把它们分开，例如
- Get list box contents
- Append Info
- Write File
- 获取列表框内容
- 附加信息
- 写文件
Please note!!There is a myriad of exceptions you can get while saving a file, see the docs and handle them somehow...
请注意！！在保存文件、查看文档并以某种方式处理它们时，您可以获得无数异常...
// Get list box contents
var sb = new StringBuilder();
foreach (var item in lstBox.Items)
{
// i am using the .ToString here, you may do more
sb.AppendLine(item);
}
string data = sb.ToString();
// Append Info
data = data + ????....
// Write File
void Save(string data)
{
using(SaveFileDialog saveFileDialog = new SaveFileDialog())
{
// optional
saveFileDialog.InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.MyComputer);
//saveFileDialog.Filter = ???;
if (saveFileDialog.ShowDialog() == DialogResult.OK)
{
File.WriteAllText(saveFileDialog.Filename);
MessageBox.Show("ok", "all good etc");
}
else
{
// not good......
}
}
}
回答by nbushnell
this should do it.
这应该这样做。
private void button1_Click(object sender, EventArgs e)
{
OpenFileDialog f = new OpenFileDialog();
f.ShowDialog();
ListBox l = new ListBox();
l.Items.Add("one");
l.Items.Add("two");
l.Items.Add("three");
l.Items.Add("four");
string textout = "";
// assume the li is a string - will fail if not
foreach (string li in l.Items)
{
textout = textout + li + Environment.NewLine;
}
textout = "extra stuff at the top" + Environment.NewLine + textout + "extra stuff at the bottom";
File.WriteAllText(f.FileName, textout);
MessageBox.Show("all saved!");
}
回答by spajce
var saveFile = new SaveFileDialog();
saveFile.Filter = "Text (*.txt)|*.txt";
if (saveFile.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
using (var sw = new StreamWriter(saveFile.FileName, false))
foreach (var item in listBox1.Items)
sw.Write(item.ToString() + Environment.NewLine);
MessageBox.Show("Success");
}
Also take note the StreamWriterhas a Type of Encoding.
还要注意StreamWriter有一个 Type of Encoding。
