请帮助解决这个问题

本文介绍了请帮助解决这个问题的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述 限时删除！！ 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 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 http://msdn.microsoft.com/en-us/library/kyt0fzt1（ v = vs.110）.aspx [ ^ ] HiI 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 PlaceHolderTextBox txtbox = new TextBox();txtbox.Text = "Textbox - " + i.ToString();PlaceHolder1.Controls.Add(txtbox);And see for more helphttp://msdn.microsoft.com/en-us/library/kyt0fzt1(v=vs.110).aspx[^] 这篇关于请帮助解决这个问题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！ 1403页，肝出来的..