如何动态添加子控件(动态添加TextBox控件)

最新推荐文章于 2022-11-07 20:22:35 发布

转载最新推荐文章于 2022-11-07 20:22:35 发布 · 1.3k 阅读

文章标签：

#textbox #asp #radiobutton #server #exception #object

本文介绍了一个使用 ASP.NET 和 C# 创建的网页表单，该表单用于收集问询问题及其答案，并提供了数据验证与保存功能。文章展示了如何通过 DataList 控件动态管理表单项，包括添加新的输入项及保存用户输入的数据到数据库。

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<%@ Page Language="C#" AutoEventWireup="true" CodeFile="InQuiryAdd2.aspx.cs" Inherits="InQuiryManager_InQuiryAdd2" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<title>娣诲姞璋冩煡淇℃伅</title>

</head>

<body>

<div>

<tr>

</td>

<asp:Label ID="Label1" runat="server" ForeColor="Red" Width="300px"></asp:Label><asp:Label ID="Lbl_WrongMessage" runat="server" ForeColor="Red" Width="300px"></asp:Label></tr>

<tr>

<td>

<asp:Label ID="Lbl_InQuiryQuestion" runat="server" Height="11px" Text="鏍囥€€棰? Width="67px"></asp:Label></td>

<td>

<asp:TextBox ID="Txt_InQuiryQuestion" runat="server" CssClass="ipt120px" Width="218px"></asp:TextBox></td>

</tr>

<tr>

<td>

<asp:Label ID="Lbl_IsShow" runat="server" Text="鏄惁鏄剧ず"></asp:Label></td>

<td>

<asp:RadioButton ID="Rad_Yes" runat="server" GroupName="isshow" Text=" 鏄? " />

<asp:RadioButton ID="Rad_No" runat="server" GroupName="isshow" Text=" 鍚?" /></td>

</tr>

<tr>

<td>

<asp:Label ID="Lbl_CheckType" runat="server" Text="閫夐」绫诲瀷"></asp:Label></td>

<td>

<asp:RadioButton ID="Rad_CheckOne" runat="server" GroupName="CheckType" Text="鍗曢€? />

<asp:RadioButton ID="Rad_CheckMore" runat="server" GroupName="CheckType" Text="澶氶€? /></td>

</tr>

<tr>

<a id="A1" href="#"><font color="white">娣诲姞閫夐」</font></a></div>

</td>

</tr>

<tr>

<td>

<asp:DataList ID="DataList1" runat="server" OnItemCreated="DataList1_ItemCreated">

</asp:DataList></td>

<td>

<asp:Button ID="btn_AddQuestion" runat="server" Text="娣诲姞閫夐」" OnClick="btn_AddQuestion_Click" CssClass="btn80px" /></td>

</tr>

<tr>

<asp:Button ID="btn_Save" runat="server" Text="鎻愪氦" OnClick="btn_Save_Click" Width="100px" CssClass="btn80px" /></td>

<asp:Button ID="btn_Reset" runat="server" OnClick="btn_Reset_Click" Text="閲嶇疆" Width="100px" CssClass="btn80px" /></td>

</tr>

<tr>

</td>

</tr>

</table>

</div>

</form>

</body>

</html>

using System;

using System.Data;

using System.Configuration;

using System.Collections;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

using BigOA.Logic;

public partial class InQuiryManager_InQuiryAdd2 : System.Web.UI.Page

{

protected void Page_Load(object sender, EventArgs e)

{

if (!this.IsPostBack)

{

DataTable dt = new DataTable();

dt.Columns.Add("newcolumns");

for (int i = 0; i < 3; i++)

{

DataRow row = dt.NewRow();

dt.Rows.Add(row);

}

this.DataList1.DataSource = dt;

this.DataList1.DataBind();

ViewState["dt"] = dt;

}

protected void btn_AddQuestion_Click(object sender, EventArgs e)

{

DataTable dt = (DataTable)ViewState["dt"];

for (int i = 0; i < this.DataList1.Items.Count; i++)

{

TextBox tb = (TextBox)this.DataList1.Items[i].Controls[0];

dt.Rows[i][0] = tb.Text;

}

DataRow row = dt.NewRow();

row[0] = "";

dt.Rows.Add(row);

ViewState["dt"] = dt;

this.DataList1.DataSource = dt;

this.DataList1.DataBind();

}

protected void DataList1_ItemCreated(object sender, DataListItemEventArgs e)

{

DataRowView drv = (DataRowView)(e.Item.DataItem);

if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)

{

TextBox tmptxt = new TextBox();

if (drv != null)

{

tmptxt.Text = drv[0].ToString();

}

tmptxt.MaxLength = 80;

e.Item.Controls.Add(tmptxt);

}

protected void btn_Save_Click(object sender, EventArgs e)

{

try

{

Lbl_WrongMessage.Text = "";

InQuiryQuestion QuiryQuestion = new InQuiryQuestion();

if (Txt_InQuiryQuestion.Text.Trim() != "")

{

QuiryQuestion.Title = Txt_InQuiryQuestion.Text.ToString();

}

else

{

throw new Exception("璋冩煡鏍囬涓嶈兘涓虹┖锛?);

}

if (Rad_Yes.Checked || Rad_No.Checked)

{

if (Rad_Yes.Checked)

{

QuiryQuestion.IsShow = "鏄?;

}

else

{

QuiryQuestion.IsShow = "鍚?;

}

else

{

throw new Exception("鏄惁鏄剧ず鑷冲皯瑕侀€夋嫨涓€椤癸紒");

}

if (Rad_CheckMore.Checked || Rad_CheckOne.Checked)

{

if (Rad_CheckMore.Checked)

{

QuiryQuestion.CheckType = "澶氶€?;

}

else

{

QuiryQuestion.CheckType = "鍗曢€?;

}

else

{

throw new Exception("绫诲瀷鑷冲皯瑕侀€夋嫨涓€椤癸紒");

}

for (int i = 0; i < this.DataList1.Items.Count; i++)

{

TextBox txt_tmp = (TextBox)this.DataList1.Items[i].Controls[0];

if (txt_tmp.Text.Trim() == "")

{

txt_tmp.Focus();

throw new Exception("鎮ㄦ病鏈夊～鍐欒皟鏌ラ€夐」!");

}

int id = QuiryQuestion.Insert();

for (int i = 0; i < this.DataList1.Items.Count; i++)

{

TextBox txt_answer = (TextBox)this.DataList1.Items[i].Controls[0];

SaveAnswer(id, txt_answer.Text);

}

Page.ClientScript.RegisterStartupScript(typeof(string), "", "<script language='javascript'>alert('娣诲姞鎴愬姛');window.location.href=window.location.href;</script>");

Txt_InQuiryQuestion.Text = "";

Rad_No.Checked = false;

Rad_Yes.Checked = false;

Rad_CheckMore.Checked = false;

Rad_CheckOne.Checked = false;

}

catch (Exception ex)

{

Lbl_WrongMessage.Text = ex.Message.ToString();

}

private void SaveAnswer(int questionID, string answer)

{