请帮助解决这个问题 [英] Kindly help for this problem

问题描述

您好b $ b我有一个下拉列表ddlProduct名称和数量文本框。当我选择产品名称并在我的文本框中写入数量并单击Button1时，根据数量值在我的占位符中生成多个文本框。但当我再次选择另一个产品和数量并单击按钮1时，当前数量文本框正在生成，而不显示以前选择的文本框。我需要生成现有产品和之前产品的textboes。两者都应该出现在我的占位符中。我该怎么做呢。请帮助。

 受保护  void  Button1_Click（ object  sender，EventArgs e）
 {
 
 {
  if （txtQuantity.Text！=  ）
 {
  for （ int  i =  0 ; i <  Convert.ToInt16（txtQuantity.Text）; i ++）
 {
 
 
标签la = 新标签（）; 
 la.Text = ddlProductName.SelectedItem.Value + i.ToString（）; 
 la.ID =   abc + i.ToString（）; 
 
 PlaceHolder1.Controls.Add（la）; 
 
  //   la = FindControl（String.Format（i））as Label;  
 
 
 
 
 TextBox txtbox =  new  TextBox（）; 
 txtbox.Text =   Textbox  -  + i.ToString（）; 
 
 
 PlaceHolder1.Controls.Add（ new  LiteralControl（ < input id ='txt'name ='Textbox + i +  'type ='text'/>））; 
 PlaceHolder1.Controls.Add（ new  LiteralControl（  
））; 
 
} 
} 
} 
 
} 

解决方案

< blockquote>

希望你错过将文本框控件添加到PlaceHolder 
 
 TextBox txtbox = new TextBox（）; 
 txtbox.Text =Textbox  - + i.ToString（）; 
 
 
 PlaceHolder1.Controls.Add（txtbox）; 

并查看更多帮助

< a href =http://msdn.microsoft.com/en-us/library/kyt0fzt1(v=vs.110).aspx> http://msdn.microsoft.com/en-us/library/kyt0fzt1（ v = vs.110）.aspx [ ^ ]

Hi I have a dropdownlist ddlProduct Name and quantity text box. When I Select a Product Name and write the quantity in my textboxes and click the Button1 that number of textboxes are generating in my place holder according to quantity value. but when I am again go to choose the another product and quantity and click the Button 1 then the current quantity textboxes are generating and not showing the previous selected textboxes. I need to generate the textboes of present product and previous. Both should appear in my place holder.How will i Do it. Kindly Help.

protected void Button1_Click(object sender, EventArgs e)
{
 
{
if (txtQuantity.Text != "")
{
for (int i = 0; i < Convert.ToInt16(txtQuantity.Text); i++)
{


Label la = new Label();
la.Text = ddlProductName.SelectedItem.Value + i.ToString();
la.ID = "abc" + i.ToString();
   
PlaceHolder1.Controls.Add(la);
 
//la = FindControl(String.Format(i)) as Label;
 

 

TextBox txtbox = new TextBox();
txtbox.Text = "Textbox - " + i.ToString();
 

PlaceHolder1.Controls.Add(new LiteralControl("<input id='txt' name='Textbox" + i + "'type='text' />"));
PlaceHolder1.Controls.Add(new LiteralControl("
"));
 
}
}
}

}

解决方案

hope so you are missing to add the textbox control to PlaceHolder
 
TextBox txtbox = new TextBox();
txtbox.Text = "Textbox - " + i.ToString();
 
 
PlaceHolder1.Controls.Add(txtbox);

And see for more help
http://msdn.microsoft.com/en-us/library/kyt0fzt1(v=vs.110).aspx[^]

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