C#将字符串放入TextBox
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C# Put string into TextBox
提问by zimzim
I want to show the results of this code in my TextBox:
我想在我的文本框中显示此代码的结果：
string txtout1 = txtOrgText.Text.Replace(parm, txtTo.Text).ToString();
txtout = txtout1;
I have a textbox, txtOrgtext, into which the user inputs text. I want to put some text into txtout now.
I have set txtout to ReadOnly and MultiLine.
我有一个文本框，txtOrgtext用户可以在其中输入文本。我现在想将一些文本放入 txtout 中。我已将 txtout 设置为 ReadOnly 和 MultiLine。
When I try running my program, I get the following error:
当我尝试运行我的程序时，出现以下错误：
Error 1 Cannot implicitly convert type 'string' to 'System.Windows.Forms.TextBox' C:\Users\xxx\AppData\Local\Temporary Projects\WindowsFormsApplication1\Form1.cs 45 25 WindowsFormsApplication1
I tried txtout1.ToString(), but nothing changes.
我试过了txtout1.ToString()，但没有任何改变。
I also tried txtout.Text = txtout1and get this error :
我也试过txtout.Text = txtout1并得到这个错误：
Cross-thread operation not valid:
Control 'txtout' accessed from a thread other than the thread it was created on.
I got an error because I used Threading, without Threading it works fine.
我收到一个错误，因为我使用了线程，没有线程它工作正常。
采纳答案by Lucas Jones
What you need to do is:
你需要做的是：
txtout.Text = txtout1;
This is because txtout1is just a string of characters, while txtoutis a full TextBox, with all the drawing and colouring and stuff like that.
这是因为txtout1它只是一串字符，txtout而是一个完整的 TextBox，包含所有绘图和着色之类的东西。
I see that you were on the right lines with your first line of code - txtOrgText.Text - the .Textis used both ways - for reading and writing. (Or "looking" and "changing" is another way of putting it.)
我看到你的第一行代码是正确的 - txtOrgText.Text -.Text两种方式都使用 - 用于阅读和写作。（或者“看”和“改变”是另一种说法。）
You do this with a lot of other controls - a ComboBox, a Form (to set the caption), a DomainUpDown (the thing with the arrows on the right) to name a few.
您可以使用许多其他控件来执行此操作 - 一个 ComboBox、一个 Form（用于设置标题）、一个 DomainUpDown（带有右侧箭头的东西）等等。
The reason that "ToString()" doesn't work is that ToString() is making your string of text into a string of text! It doesn't turn it into a TextBox for you.
“ToString()”不起作用的原因是 ToString() 正在将您的文本字符串转换为文本字符串！它不会把它变成一个 TextBox 给你。
回答by David
txtOut.Text = txtout1;
txtOut.Text = txtout1;
回答by Raghav
First of all txtout = txtout1;will not serve as txtout is a textbox and txtout1 is a string .You should use
首先 txtout = txtout1;不会作为 txtout 是一个文本框而 txtout1 是一个字符串。你应该使用
txtout.Text = txtout1
txtout.Text = txtout1
ie .Text property of textbox says Gets or Sets the current text in System.Windows.Forms.TextBoxand its type is string as your txtout1 is already a string there is no need to convert it again by using .ToString()
即文本框的 .Text 属性表示 获取或设置 System.Windows.Forms.TextBox 中的当前文本，其类型为字符串，因为您的 txtout1 已经是字符串，因此无需使用 .ToString() 再次转换它
