如何更改textbox'texts是以编程方式 [英] how to change textbox'texts are made programmatically

问题描述

hi.i以编程方式制作了一些文本框：

  public  Form2（）
 {
。 
。 
  for （ int  j =  0 ; uni [j]！=   end; j ++） //  填充行数到结束 
 {
 list.Add（ new  System.Windows.Forms.TextBox（））; 
 list [j] .Name =   ckifile + j; 
 list [j] .Size =  new 大小（ 50 ， 20 ）; 
 list [j] .Location =  new  System.Drawing.Point（ 400 ，loc） ; 
 list [j] .TabIndex =  2 ; 
 list [j] .KeyDown + =  new  KeyEventHandler（txtfilenam_keydown）; 
  this  .Controls.Add（list [j]）; 
} 
} 

现在我想要点击button1，clipborad中的数据会粘贴到Textboxes。

< pre lang =c＃> private void button1_Click（ object sender，EventArgs e）
{
int k = 0 ;
Form2 frm2 = new Form2（）;
string s = Clipboard.GetText（）;
string [] lines = s.Split（' \\\
'）;
foreach （ string line in 行）
{
if （k < list.Count）
{
// 此部分错误
frm2.list [ k] .Text = line; ??????????????
frm2.Controls.Add（list [k ++]）; ?????????????
}
else
break ;
}
}

我该怎么做？

谢谢

解决方案

这取决于你创建的列表类型是否编译，但是如果我认为它确实存在那么你就不能这样做。

问题是你在点击处理程序中创建了一个Form2的新实例：

 Form2 frm2 =  new  Form2（）; 
 

并设置其值 - 这与您显示的表格不同，如果您将手机放入汽车手套箱，然后购买新车，你不会期望在它的手套箱中找到你的手机！



假设按钮是Form2的一部分，那么你不需要指定访问列表时的任何形式：

  private   void  button1_Click（ object  sender，EventArgs e）
 {
  int  k =  0 ; 
  string  s = Clipboard.GetText（）; 
  string  [] lines = s.Split（'  \\\
'）; 
  foreach （ string  line  in 行）
 {
  if （k <  list.Count）
 {
 list [k ++]。Text = line; 
} 
  else  
  break ; 
} 
} 

如果它不是，那么你想保留对你已经创建并显示的Form2实例的引用并使用它 - 但最好是，但是将新文本传递给表单实例中的属性或方法，并让它完成工作。

hi.i made some textbox programmatically:

public Form2()
{
  .
  .
   for (int j = 0; uni[j] != "end"; j++) //number of fill row till "end"
   {
                list.Add(new System.Windows.Forms.TextBox());
                list[j].Name = "ckifile" + j;
                list[j].Size = new Size(50, 20);
                list[j].Location = new System.Drawing.Point(400, loc);
                list[j].TabIndex = 2;
                list[j].KeyDown += new KeyEventHandler(txtfilenam_keydown);
                this.Controls.Add(list[j]);
   }
}

now i want when button1 is clicked,data in clipborad be paste to Textboxes.

private void button1_Click(object sender, EventArgs e)
       {
           int k=0;
           Form2 frm2 = new Form2();
           string s = Clipboard.GetText();
           string[] lines = s.Split('\n');
           foreach (string line in lines)
           {
               if (k < list.Count)
               {
                  //this part is wrong
                   frm2.list[k].Text = line;???????????????
                   frm2.Controls.Add(list[k++]);?????????????
               }
               else
                   break;
           }
       }

how can i do that?
thanks

解决方案

It depends on what type of List you have created whether it compiles or not, but if I assume it does then you can''t do it like that.
The problem is that you are creating a new instance of a Form2 in your click handler:

Form2 frm2 = new Form2();

And setting the value of that - this is not the same as the form your are displaying in the same way that if you put your mobile in your car glove box, then buy a new car, you would not expect to find you mobile in it''s glove box!

Assuming that the button is a part of Form2, then you do not need to specify any form when accessing the list:

private void button1_Click(object sender, EventArgs e)
       {
           int k=0;
           string s = Clipboard.GetText();
           string[] lines = s.Split('\n');
           foreach (string line in lines)
           {
               if (k < list.Count)
               {
                   list[k++].Text = line;
               }
               else
                   break;
           }
       }

If it isn''t, then you want to keep a reference to the instance of Form2 you have already created and shown and use that - but preferably, but passing the new text to a Property or method within the form instance and letting it do the work.

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