获取动态生成TextBox控件的文本？ [英] Get text of dynamically generated TextBox controls?

问题描述

 for(int i = 0; i < numberOfFields; i++)
 {
      TextBox generatedField = new TextBox();
      generatedField.Text = "Please enter Field Report ID Here";
      generatedField.Width = 176;
      generatedField.Location = new Point(pointX, pointY);
      panel1.Controls.Add(generatedField);
      panel1.Show();
      pointY += 25;
}

生成文本框后，我怎么能找出被输入到他们吗？

After generating the TextBoxes, how can I find out what was typed into them?

推荐答案

您需要设置名称您的控件，那么你就可以通过名称访问它们是这样的：

You need to set Name of your controls, then you can access them by name this way:

创建的控制和分配名称：

for(int i = 0; i < numberOfFields; i++)
{
     TextBox generatedField = new TextBox();
     generatedField.Name = "someName_" + i.ToString();
     generatedField.Text = "Please enter Field Report ID Here";
     generatedField.Width = 176;
     generatedField.Location = new Point(pointX, pointY);
     panel1.Controls.Add(generatedField);
     panel1.Show();
     pointY += 25;
}

查找和使用控制：

var txt = (TextBox)panel1.Controls["someName_1"];
MessageBox.Show(txt.Text);

一些注意事项：

唯一名称：的注意生成唯一的名称

Unique Names: Pay attention to generate unique names.

空检查：的您可能希望 VAR TXT之后添加空检查=（文本框）panel1.Controls [someName_1];

另一个选择：的：您可以使用 this.Controls .Find 结果
。您也可以使用此代码，这将返回一个文本框与的名称someName_1 ：

 var txt = this.Controls.Find("someName_1", true).Cast<TextBox>().FirstOrDefault();

处理事件：的：您可以添加框TextChanged 事件结果
另一件事可能对你有用，是加入框TextChanged 创建控件时，事件：

Handling Events: You can add TextChanged event
Another thing you may find useful, is adding TextChanged event when creating controls:

generatedField.TextChanged += generatedField_TextChanged;

这样，你应该在形式上此方法：

This way, you should have this method in form:

void generatedField_TextChanged(object sender, EventArgs e)
{
    var txt = (TextBox)sender;
    // do what you need with txt.Text and other properties
}

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