使用“SelectedItem.Tostring（）”时出现奇怪的空格; [英] Strange space appears when using "SelectedItem.Tostring()";

问题描述

编辑：请阅读结尾如果这篇文章



您好，



我有一个小到目前为止，我的代码存在问题：我目前正在使用命令

txtnume.Text = listbox1.SelectedItem.ToString（）;其中 txtnume 是文本框和 listbox1 是一个列表框。



这么好，到目前为止。



但是，如果我试图复制来自的文本txtnume，我会得到很多空间：\而且我真的不知道如何摆脱它。



以下是一些截图：

& http://tinypic.com/r/t4uzb9/8< - image 1

& http://tinypic.com/r/2dtnm0m/8< - 图像2

 private void listBox2_SelectedIndexChanged（object sender，EventArgs e）
 {
 ListBox l = sender作为ListBox; 
 if（l.SelectedIndex！= -1）
 {
 listBox1.SelectedIndex = l.SelectedIndex; 
 listBox2.SelectedIndex = l.SelectedIndex; 
 txtnume.Text =; 
 txtprenume.Text =; 
 txtnume.Text = listBox1.SelectedItem.ToString（）; 
 txtprenume.Text = listBox2.SelectedItem.ToString（）; 
} 
} 
 

这是我用来编写所选代码的代码项目进入我的文本框。我还需要在 - >的文本框中写下该项目。 image2

你能帮帮我吗？



祝福，

SnuKies







编辑：



我的完整代码：

http://www.codeshare.io/N1K72 [ ^ ]



EDIT2：我已经解决了这个问题：我将名称存储在字符串类型的nvchar（50）中，这会导致我的问题。现在，我已经将类型更改为ntext，我还有另一个问题：cmd.ExecuteNonQuery（）;< - 每次我尝试删除项目时都会出错。错误的文本是：数据类型ntext和varchar在等于运算符中不兼容。

解决方案

如果您的问题是任何前导或尾随空格被注入通过键盘等任何东西 - >我建议在使用之前修剪文本值。

  string  numeVal = txtnume.Text.Trim（）; 

如果值为空，则Trim将最少留下你的是String.Empty。 ：）

EDIT: PLEASE read the end if this article

Hello,

I have a small problem with my code, so far: I'm currently using the command
"txtnume.Text = listbox1.SelectedItem.ToString(); " where txtnume is the name of a textbox and listbox1 is a listbox.

So good, so far.

But, if I'll try to copy the text from txtnume, I'll get a lot of space :\ and I really do not know how to get rid of it.

Here are some screenshots:
&http://tinypic.com/r/t4uzb9/8 <- image 1
&http://tinypic.com/r/2dtnm0m/8 <- image 2

private void listBox2_SelectedIndexChanged(object sender, EventArgs e)
       {
           ListBox l = sender as ListBox;
           if (l.SelectedIndex != -1)
           {
               listBox1.SelectedIndex = l.SelectedIndex;
               listBox2.SelectedIndex = l.SelectedIndex;
               txtnume.Text = "";
               txtprenume.Text = "";
               txtnume.Text = listBox1.SelectedItem.ToString();
               txtprenume.Text = listBox2.SelectedItem.ToString();
           }
       }

this is the code i've been using to write the selected item into my textbox. I also need to write that item in the textbox from -> image2
Could you help me, please?

Best wishes,
SnuKies



EDIT:

My full code:
http://www.codeshare.io/N1K72[^]

EDIT2: I've solved that problem: I'd store the name in a string-type nvchar(50) and that would cause me that problem. Now, that i've changed the type to ntext, I have another problem: cmd.ExecuteNonQuery();<- it gives me an error everytime i try to delete an item. The error's text is: "The data types ntext and varchar are incompatible in the equal to operator."

解决方案

If your issue is any leading or trailing spaces that get injected by anything like keyboard, etc. -> I would recommend trimming the text values before using them.

string numeVal = txtnume.Text.Trim();

If the value is empty, the least the Trim will leave you with is String.Empty. :)

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