将多个项目从列表框添加到文本框 [英] Add multiple items from ListBox to TextBox

问题描述

hi ..

我想将选择的多个项目表单列表框添加到每个项目中用逗号分隔的文本框(MultiLine).我知道如何将多个列表框值添加到另一个列表框.但是我该如何为文本框添加内容呢?

如果有人可以帮助我，这将是极大的帮助.
谢谢.

hi..

i want to add selected multiple items form list box to text box(MultiLine) seperated with a comma in each item.I know how to add multiple list box values to another List box. but how can i add for the text box.

it will be a grate help if some one can help me with this.
thank you.

推荐答案

除了其他响应者所说的之外，我将使用StringBuilder来组合字符串.将大量字符串组合在一起时，通常最好使用StringBuilder.另外，我将使用object.ReferenceEquals来比较两个对象，而不是使用默认的inequality运算符.

另外，我知道您不要求在每个逗号后插入换行符，因此您可以将其从响应者提供给您的代码中删除.但是，如果您确实想插入换行符，则可以使用Environment.NewLine而不是"\ r \ n".

创建StringBuilder后，调用ToString并将结果分配给您正在使用的TextBox的Text属性.

In addition to what the other responder said, I''d use a StringBuilder to combine the strings. It''s generally a good idea to use a StringBuilder when combining a significant number of strings together. Also, instead of using the default inequality operator, I''d use object.ReferenceEquals to compare the two objects.

Also, I know you didn''t ask for a newline to be inserted after each comma, so you can take that out of the code the responder gave you. But if you do want to insert a newline, I''d use Environment.NewLine rather than "\r\n".

Once you are done creating the StringBuilder, call ToString and assign the result to the Text property of the TextBox you are using.

如果您知道如何处理列表框中的多行，只需将这些值一起添加到字符串中，然后将字符串的值分配给文本框，或直接分配给文本框.

If you know how to process multiple lines out of a list box, simply append the values together either into a string, then assign the value of the string to the text box, or directly into the text box.

好吧，我的解决方案是:

考虑我们在窗体上有一个列表框，其"SelectionMode"属性设置为值"MultiSimple"，以及一个文本框，其"Multiline"属性为true，而"WordWrap"属性为false.当然还有一个按钮，用于将列表框中的项目添加到文本框中.

我在"button1_Click"事件中的代码为:

private void button1_Click(对象发送者，EventArgs e)
{
int count = listBox1.SelectedItems.Count;

foreach(listBox1.SelectedItems中的对象项)
{
textBox1.Text + = item.ToString();

如果(listBox1.SelectedItems [count-1]！= item)
textBox1.Text + =，\ r \ n";
}
}

因此，列表框中的每个选定项都将添加(通过ToString()函数作为字符串)到文本框的文本中，如果不是最后一个选定项，则将添加逗号和新行.

------------------------
问候

H.Maadani

Well, my solution for that would be :

consider we have a listbox on form, with its ''SelectionMode'' property set to value ''MultiSimple'', and a textbox which ''Multiline'' property is true, and ''WordWrap'' property is false. and of course a button to add items from listbox to textbox.

my code in the ''button1_Click'' event would be :

private void button1_Click(object sender, EventArgs e)
{
int count = listBox1.SelectedItems.Count;

foreach (object item in listBox1.SelectedItems)
{
textBox1.Text += item.ToString();

if (listBox1.SelectedItems[count - 1] != item)
textBox1.Text += ", \r\n";
}
}

So, each selected item in listbox will be added ( as an string via ToString() function) to textbox''s text, and if it isnt the last selected item, a comma and a new line will be added.

------------------------
Regards

H.Maadani

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