如何在按钮单击时动态添加文本框 [英] how to add textboxes dynamically on button click

问题描述

我想在按钮上添加文本框，无论何时单击按钮一次一个或两个...

i want to add textbox on button click one or two at a time on whatever times click on button ...

推荐答案

下面是您想法的示例代码。请根据您的要求优化此代码。

Below is sample code for you idea. Please refine this code according to your requirement.

protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        ViewState["textBoxCount"] = 0;
    }

}

protected void Button1_Click(object sender, EventArgs e)
{
    int textBoxCount =(int) ViewState["textBoxCount"] ;
    textBoxCount++;
    for (var i = 0; i < textBoxCount; i++)
    {
        TextBox txt = new TextBox();
        Literal lit = new Literal();
        lit.Text = "";

        PlaceHolder1.Controls.Add(txt);
        PlaceHolder1.Controls.Add(lit);
    }
    ViewState["textBoxCount"] = textBoxCount;
}

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