如何在asp.net和c＃中动态创建文本框。 [英] How to dynamically create textboxes in asp.net and c#.

问题描述

我已经在c＃中动态创建了文本框。



TextBox MyTextBox = new TextBox（）;

MyTextBox.ID =tb ++ ViewState [num];

MyTextBox.Width = 540;

MyTextBox.Height = 60;

MyTextBox.TextMode = TextBoxMode.MultiLine;



this.Controls.Add（MyTextBox）;

解决方案

你已经在你提到的代码中添加了控件：

按钮button1 =  new 按钮（）; 
 button1.Text =  动态按钮; 
 button1.Left =  10 ; button1.Top =  10 ;  //  按钮的位置 
 此 .Controls.Add（按钮1）;  //  这是您添加控件的方法 

请参考;

代码：在运行时添加控件（Visual C＃） [ ^ ]

动态地向ASP.NET表单添加控件 [ ^ ]



ASP.NET动态控件 [ ^ ]

<块引用> 我们如何在ASP.NET中动态创建TextBox并获取TextBox的文本： -



使用System;

使用System.Configuration;

使用System.Web.UI.WebControls;

使用System.Data.SqlClient;



public partial class _Default：System.Web.UI.Page

{

protected void Page_Load（object sender，EventArgs e）

{

if（！IsPostBack）

{

int addedBooks = 2; //设置所需的动态文本框数量

ViewState [addedBooks] = addedBooks;

CreateDynamicTextBox（）;

}

else

{

//如果回发动态生成的控件是不可见的

//所以我们可以在每个帖子中绑定

CreateDynamicTextBox（） ;

}



}



//创建动态文本框的方法

protected void CreateDynamicTextBox（）

{

int addedBooks = Convert.ToInt16（ViewState [addedBooks ]）;

for（int i = 0;我< addedBooks; i ++）

{

Literal lt1 = new Literal（）;

lt1.Text =书名：+（i + 1） +;

pnl1.Controls.Add（lt1）; //pnl1是Panel的id



TextBox MyTextBox = new TextBox（）;

//分配文本框ID名称

MyTextBox.ID =tb+ i;

MyTextBox.Width = 100;

MyTextBox.Height = 15;

MyTextBox.Text = String.Empty;

pnl1.Controls.Add（MyTextBox）;



Literal lt = new Literal（）;

lt.Text =
;

pnl1 .Controls.Add（lt）;

}

}



//查找动态文本框的文本按钮单击

protected void btnSubmit_Click（object sender，EventArgs e）

{

int NoOfDynamicTextBoxes = Convert.T oInt32（ViewState [addedBooks]）;

String [] books = new String [NoOfDynamicTextBoxes];

for（int i = 0;我< NoOfDynamicTextBoxes; i ++）

{

String txtId =tb+ i; //生成动态创建的TextBox的id

TextBox txtUserName = pnl1.FindControl （txtId）as TextBox;

if（txtUserName！= null）

{

books [i] = txtUserName.Text;

}

}

}

}

用于创建文本框的代码片段控制n次，

 //声明变量的限制为
 int n = 5; 
 for（int i = 0; i< n; i ++）
 {
 TextBox MyTextBox = new TextBox（）; 
 //分配文本框ID名称
 MyTextBox.ID =tb++ ViewState [num] + i; 
 MyTextBox.Width = 540; 
 MyTextBox.Height = 60; 
 MyTextBox.TextMode = TextBoxMode.MultiLine; 
 this.Controls.Add（MyTextBox）; 
} 

我希望这可以帮到你。



关于

RK

i have created textboxes dynamically in c#.

TextBox MyTextBox=new TextBox();
MyTextBox.ID = "tb" +""+ ViewState["num"];
MyTextBox.Width = 540;
MyTextBox.Height = 60;
MyTextBox.TextMode = TextBoxMode.MultiLine;

this.Controls.Add(MyTextBox);

解决方案

You have already added control in code you mentioned:

Button button1=new Button();
button1.Text="dynamic button";
button1.Left=10; button1.Top=10;  //the button's location
this.Controls.Add(button1); //this is how you can add control

Please refer;
Code: Adding Controls at Run Time (Visual C#)[^]
Adding Controls to an ASP.NET form Dynamically[^]

ASP.NET Dynamic Controls[^]

How we Dynamically Create TextBoxes in ASP.NET and get the Text of that TextBoxes :-

using System;
using System.Configuration;
using System.Web.UI.WebControls;
using System.Data.SqlClient;

public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
int addedBooks = 2;// Set Required Number of Dynamic TextBoxes
ViewState["addedBooks"] = addedBooks;
CreateDynamicTextBox();
}
else
{
//if postback dynamic generated controls are invisible
//so we can bind in each post back
CreateDynamicTextBox();
}

}

//Method for Creating Dynamic TextBoxes
protected void CreateDynamicTextBox()
{
int addedBooks =Convert.ToInt16(ViewState["addedBooks"]);
for (int i = 0; i < addedBooks; i++)
{
Literal lt1 = new Literal();
lt1.Text = "Book Name : " + (i + 1) + " ";
pnl1.Controls.Add(lt1);// "pnl1" is a id of Panel

TextBox MyTextBox = new TextBox();
//Assigning the textbox ID name
MyTextBox.ID = "tb" + i;
MyTextBox.Width = 100;
MyTextBox.Height = 15;
MyTextBox.Text = String.Empty;
pnl1.Controls.Add(MyTextBox);

Literal lt = new Literal();
lt.Text = "
";
pnl1.Controls.Add(lt);
}
}

//Find Text of Dynamic TextBoxes on Button Click
protected void btnSubmit_Click(object sender, EventArgs e)
{
int NoOfDynamicTextBoxes = Convert.ToInt32(ViewState["addedBooks"]);
String[] books = new String[NoOfDynamicTextBoxes];
for (int i = 0; i < NoOfDynamicTextBoxes; i++)
{
String txtId = "tb" + i;// Produce id of Dynamically created TextBoxes
TextBox txtUserName = pnl1.FindControl(txtId) as TextBox;
if (txtUserName != null)
{
books[i] = txtUserName.Text;
}
}
}
}

Code snippet to create a textbox control for n number of times,

//Declaring the variable with limit
int n=5;
for (int i=0;i<n;i++)
{
TextBox MyTextBox=new TextBox();
//Assigning the textbox ID name 
MyTextBox.ID = "tb" +""+ ViewState["num"] + i;
MyTextBox.Width = 540;
MyTextBox.Height = 60;
MyTextBox.TextMode = TextBoxMode.MultiLine;
this.Controls.Add(MyTextBox);
}

I hope this could help you.

With regards
R.K.

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