本文实例讲述了C#后台创建控件并获取值的方法。分享给大家供大家参考。具体实现方法如下：

前台代码:

后台代码:

            // 注意：每次PostBack时，都需要重新动态创建TextBox
            CreateTextBoxList(txtCount);
        }
    }
    ///<summary> 

    /// Create textbox list
    ///</summary>
    ///<param name=\"num\">textbox list count</param>
    private void CreateTextBoxList(int num)
    {
        HtmlGenericControl div;
        HtmlGenericControl span;
        TextBox txt;
        //RegularExpressionValidator rev;

        for (int i = 0; i < num; i++)
        {
            //创建div
            div = new HtmlGenericControl();
            div.TagName = \"div\";
            div.ID = \"divTextBox\" + i.ToString();
            div.Attributes[\"class\"] = \"item2\";

            //创建span
            span = new HtmlGenericControl();
            span.ID = \"spanTextBox\" + i.ToString();
            span.InnerHtml = \"Url Address\" + (i + 1).ToString() + \":\";

            //创建TextBox
            txt = new TextBox();
            txt.ID = \"txt\" + i.ToString();
            txt.CssClass = \"input\";

            //创建格式验证控件，并且将其关联到对应的TextBox
            //rev = new RegularExpressionValidator();
            //rev.ID = \"rev\" + i.ToString();
            //rev.ControlToValidate = txt.ID;
            //rev.Display = ValidatorDisplay.Dynamic;
            //rev.ValidationGroup = \"ShowListContent\";
            //rev.ValidationExpression = @\"(http(s)?://)?([\\w-]+\\.)+[\\w-]+(/[\\w- ./?%&=]*)?\";
            //rev.ErrorMessage = \"Invalid url Address!\";

            //添加控件到容器
            div.Controls.Add(span);
            div.Controls.Add(txt);
            //div.Controls.Add(rev);
            divControls.Controls.Add(div);
        }
    }

    protected void btnCreate_Click(object sender, EventArgs e)
    {
        txtTextCount.Enabled = false;
        btnCreate.Enabled = false;
    }

    protected void btnOK_Click(object sender, EventArgs e)
    {
        TextBox txt;
        HtmlGenericControl span;
        StringBuilder sbResult = new StringBuilder();
        int txtCount = int.Parse(txtTextCount.Text);

        //遍历获取动态创建的TextBox们中的Text值
        for (int i = 0; i < txtCount; i++)
        {
            //注意：这里必须通过上层容器来获取动态创建的TextBox，才能获取取ViewState内容
            txt = divControls.FindControl(\"txt\" + i.ToString()) as TextBox;

            if (txt != null && txt.Text.Trim().Length > 0)
            {
                sbResult.AppendFormat(\"Url Address{0}: {1}.<br />\", i + 1, txt.Text.Trim());
            }
        }
        //遍历获取动态创建的TextBox们中的Text值
        for (int i = 0; i < txtCount; i++)
        {
            //注意：这里必须通过上层容器来获取动态创建的TextBox，才能获取取ViewState内容
            span = divControls.FindControl(\"spanTextBox\" + i.ToString()) as  HtmlGenericControl ;

            if (span != null && span.InnerText.Trim().Length > 0)
            {
                sbResult.AppendFormat(\"Url Address{0}: {1}.<br />\", i + 1, span.InnerText.Trim());
            }
        }
        divMessage.InnerHtml = sbResult.ToString();
}