asp.net 防重复提交submit控件

在页面post提交的时候，我们经常会碰到重复提交的的问题，前面有高手写过防刷新的办法，是基于viewstate，这样就会有一个问题：必须使用ruant="server"的form，有的时候我们仅需要使用客户端form就可以，防刷新，防重复提交就又成了一个问题。

下面我采用session和hidden，写了一个submit控件，能够有效的防止重复提交

代码如下：

Shenjk.Controls.Submitusing System;
using System.Collections.Generic;
using System.Text;
using System.ComponentModel;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;

namespace Shenjk.Controls
{
    /// <summary>
    /// 防止重复提交
    /// http://www.shenjk.com
    /// </summary>
    [DefaultProperty("Text")]
    [ToolboxData("<{0}:Submit runat=server></{0}:Submit>")]
    public class Submit:System.Web.UI.WebControls.WebControl
    {
        private HtmlInputSubmit m_Submit = new HtmlInputSubmit("submit");
        private HtmlInputHidden m_Hidden = new HtmlInputHidden();
        public Submit() {

        }
        #region
        [Bindable(true)]
        [Category("Appearance")]
        [DefaultValue("")]
        [Localizable(true)]
        public string Value {
            get { return m_Hidden.Value; }
            set { m_Hidden.Value = value; }
        }
        [Bindable(true)]
        [Category("Appearance")]
        [DefaultValue("发送")]
        [Localizable(true)]
        public string Text {
            get { return m_Submit.Value; }
            set { m_Submit.Value = value; }
        }
        #endregion

        protected override void Render(HtmlTextWriter writer)
        {
            if (!this.Width.IsEmpty)
            {
                this.m_Submit.Style.Add("width", this.Width.ToString());
            }
            if (!this.Height.IsEmpty) {
                this.m_Submit.Style.Add("height", this.Height.ToString());
            }
            if (!string.IsNullOrEmpty(this.CssClass)) {
                this.m_Submit.Attributes.Add("class", this.CssClass.ToString());
            }

            this.m_Hidden.ID = this.ClientID;
            this.m_Hidden.Value = System.DateTime.Now.ToString();
            this.m_Hidden.RenderControl(writer);
            this.m_Submit.ID = this.ClientID + "_Submit";
            this.m_Submit.Attributes.Add("onclick","this.style.border='1px solid #f00';this.value='正在发送...';this.style.backgroundColor='#fff'; /*this.disabled=true;return true;*/");
            this.m_Submit.RenderControl(writer);

        }

        public bool IsRefresh() {
            if (System.Web.HttpContext.Current.Session[this.ClientID]==null || (System.Web.HttpContext.Current.Session[this.ClientID] != null && System.Web.HttpContext.Current.Request.Form[this.ClientID] != System.Web.HttpContext.Current.Session[this.ClientID].ToString()))
            {
                return false;
            }
            return true;
        }
        public void ReSet() {
            if (System.Web.HttpContext.Current.Session[this.ClientID] != null) {
                System.Web.HttpContext.Current.Session.Remove(this.ClientID);
            }
        }
        protected override void OnLoad(EventArgs e)
        {
            if (System.Web.HttpContext.Current.Request.HttpMethod == "POST") {
                System.Web.HttpContext.Current.Session[this.ClientID] = System.Web.HttpContext.Current.Request.Form[this.ClientID].ToString();
            }
            base.OnLoad(e);
        }
    }
}

使用示例:

test.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="test.aspx.cs" Inherits="test" %>
<%@ Register assembly="Shenjk.Controls" namespace="Shenjk.Controls" tagprefix="cc1" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

test.aspx.cs

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;

public partial class test : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (this.Request.HttpMethod == "POST")
        {
            if (Submit1.IsRefresh()) {
                Label1.Text = "请不要直接刷新页面,且不要重复提交";
            }

}
}
}

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原文地址：https://www.cnblogs.com/leeolevis/p/1383143.html