如何获取从动态创建的文本框输入的值？ [英] How do I get values that entered from dynamically created textbox?

问题描述

我创建了一个函数，用于从下拉列表中获取用户的值，并根据我应创建的文本框的数字。



我通过在aspx页面中创建一个面板，在for循环中创建了动态文本框。



现在我如何获得在文本框中输入的值？



我尝试过以下代码，但这不起作用..



//代码到创建动态文本框



public void users（int cnt）

{



for（int i = 1; i< = cnt; i ++）

{

TextBox txtuserAlias = new TextBox（）;

txtuserAlias.Text =;

txtuserAlias.ID =txtUserAlias+ i;

pnldisplayform.Controls.Add（txtuserAlias）;

}

}



//调用文本框中输入值的代码

public void adduser （）

{

int cnt1 = Int32.Parse（DropDownNoOfUsers.SelectedValue.ToString（））;

for（int i = 1; i< = cnt1; i ++）

{

TextBox txtuserAlias = new TextBox（）;

txtuserAlias.ID =txtUserAlias+ i ;

some method = txtuserAlias.Text;

}

}



你能帮忙吗？

在此先感谢。

I have created a function to get the value from user in a drop down and based on the number I should create few text boxes.

I have did created dynamic textboxes in a for loop by creating a panel in aspx page.

Now how can i get the values that entered in the text boxes?

I have tried the below code but that doesn't works..

// code to create dynamic text boxes

public void users(int cnt)
{

for (int i = 1; i <= cnt; i++)
{
TextBox txtuserAlias = new TextBox();
txtuserAlias.Text = "";
txtuserAlias.ID = "txtUserAlias" + i;
pnldisplayform.Controls.Add(txtuserAlias);
}
}

//code to call the value that entered in the text box
public void adduser()
{
int cnt1 = Int32.Parse(DropDownNoOfUsers.SelectedValue.ToString());
for (int i = 1; i <= cnt1; i++)
{
TextBox txtuserAlias = new TextBox();
txtuserAlias.ID = "txtUserAlias" + i;
some method = txtuserAlias.Text;
}
}

Could you please help with the same.
Thanks in advance.

推荐答案

您好，



如果您将TextBox添加到pnldisplayform，那么您应该能够使用pnldisplayform再次找到它们。 FindControl [ ^ ]方法。



这样的事情可以让你入门。

Hi,

If you adding your TextBoxes to pnldisplayform, then you should be able to find them again using the pnldisplayform.FindControl[^] method.

Something like this should get you started.

for (int i = 1; i <= cnt1; i++)
{
  //Find TextBox in Panel Container ... 
  TextBox txtuserAlias = (TextBox)pnldisplayform.FindControl("txtUserAlias" + i);
  //Check we have found a TextBox ... 
  if (txtuserAlias != null)
  {
    someMethod(txtuserAlias.Text);
  }
  //Clear control reference for next iteration ...
  txtuserAlias=null; 
}

...希望它有所帮助。

... hope it helps.

尝试这段代码可能会对你有所帮助：



查看：

try this code may be it will help u :

View:

<asp:DropDownList ID="DropDownNoOfUsers" runat="server" AutoPostBack="True">
       <asp:ListItem>1</asp:ListItem>
       <asp:ListItem>2</asp:ListItem>
       <asp:ListItem>3</asp:ListItem>
       <asp:ListItem>4</asp:ListItem>
       <asp:ListItem>5</asp:ListItem>
   </asp:DropDownList>
   <br />
   <asp:Panel ID="pnldisplayform" runat="server">
   </asp:Panel>
   <asp:Button runat="server" ID="Btn_Value" OnClick="Btn_Value_Click" Text="GetValue"/>

   <br />
   <asp:ListBox ID="ListUser" runat="server" Width="200"></asp:ListBox>

代码背后：

Code Behind :

private List<string> _users;
 protected void Page_Load(object sender, EventArgs e)
 {
     var cnt = Int32.Parse(DropDownNoOfUsers.SelectedValue);
     Users(cnt);
 }
 public void Users(int cnt)
 {

     for (var i = 1; i <= cnt; i++)
     {
         var txtuserAlias = new TextBox { Text = "", ID = "txtUserAlias" + i };
         txtuserAlias.Attributes.Add("runat", "Server");
         txtuserAlias.EnableViewState = true;
         pnldisplayform.Controls.Add(txtuserAlias);
     }
 }
 public List<string> GetUsers()
 {
     return pnldisplayform.Controls.OfType<TextBox>().Select(box => box.Text).ToList();
 }


 protected void Btn_Value_Click(object sender, EventArgs e)
 {
     _users = GetUsers();
     foreach (var user in _users)
     {
         ListUser.Items.Add(user);
     }

 }

这篇关于如何获取从动态创建的文本框输入的值？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！