如何发现哪个动态创建的文本框已更改 [英] How do I discover which dynamically created textbox was changed

问题描述

我有2个表单，我在第二个表单上动态创建文本框。我想知道是否有任何这些框中的文本被更改，以便我可以在XML文件中更改它将文本框文本写入。

更新：

我了解如何从动态创建的文本框中创建和获取文本。它正在弄清楚哪一个已被更改，然后在我无法弄清楚的XML文件中更改它。



我尝试了什么：



i尝试使用foreach语句，但不确定如何找到哪一个被更改

I have 2 forms and i am dynamically creating textboxes on the second form. i want to know if the text in any of those boxes were changed so that i can change it in the XML file it writes the textbox text to.
Update:
I understand how to create and get the text from the dynamically created textboxes.It is figuring out which one was changed and then changing it in the XML file that i cant figure out.

What I have tried:

i tried using a foreach statement but wasnt sure how to find which one was changed

推荐答案

var totalTextBox = 5;

// Create TextBox dynamically
for ( int i = 0 ; i < totalTextBox ; i++ )
{
   TextBox tb = new TextBox();
   tb.ID = "tb" + i;
   tb.TextChanged += TextBox_TextChanged;
}

// All TextBox point to same event
private void TextBox_TextChanged(object sender, EventArgs e)
{
   // sender points to modified TextBox
   // All you need to do is cast it
   TextBox modified = (TextBox)sender;
}

我认为你会覆盖文本框上的.Change事件？我们在谈论哪种语言？假设C＃，你会为它创建一个eventhandler，如下所示：

I presume that you would override the .Change event on the textboxes? Which language are we talking about? Presuming C#, you would create an eventhandler for it, like this:

this.textbox.change += new EventHandler (myFunctionName);

然后在你的代码中：

Then later in your code:

void myFunctionName(object Sender, EventArgs e) { do something here; }

这就是我的建议。

That's what I'd recommend.

我实际上想出了这个我放的文本框名称的计数器和textchanged事件处理程序中的bool。然后检查bool是否为真，如果是，那么我检查所有名称以找到哪一个被更改

I actually figured this one out i put a counter for the names of the textboxes and a bool in the textchanged event handler.I then checked if the bool was true and if it was then i checked all the names to find which one was changed

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