Created
May 3, 2012 15:42
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多重ポスト対策のミニマムコード
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| <%@ Page Language="C#" AutoEventWireup="true" %> | |
| <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> | |
| <html xmlns="http://www.w3.org/1999/xhtml"> | |
| <head runat="server"> | |
| <title></title> | |
| <script runat="server"> | |
| protected void Page_Load(object sender, EventArgs e) | |
| { | |
| if (!Page.IsPostBack) | |
| { | |
| string token = GenerateToken(); | |
| Session["Token"] = token; | |
| ViewState["Token"] = token; | |
| Label1.Text = ""; | |
| } | |
| } | |
| protected void Button1_Click(object sender, EventArgs e) | |
| { | |
| var vsToken = ViewState["Token"] as string; | |
| var sToken = Session["Token"] as string; | |
| if (vsToken == sToken) | |
| { | |
| var newToken = GenerateToken(); | |
| Session["Token"] = newToken; | |
| ViewState["Token"] = newToken; | |
| System.Threading.Thread.Sleep(2000); | |
| Label1.Text = "更新完了しました！"; | |
| } | |
| else | |
| { | |
| Label1.Text = "既に処理済みです！"; | |
| } | |
| } | |
| protected void Button2_Click(object sender, EventArgs e) | |
| { | |
| string token = DateTime.Now.ToString(); | |
| Session["Token"] = token; | |
| ViewState["Token"] = token; | |
| Label1.Text = ""; | |
| } | |
| protected string GenerateToken() | |
| { | |
| return Guid.NewGuid().ToString(); | |
| } | |
| </script></head> | |
| <body> | |
| <form id="form1" runat="server"> | |
| <div> | |
| <asp:Button ID="Button1" runat="server" Text="Update" onclick="Button1_Click" /> | |
| </div> | |
| <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label> | |
| <div> | |
| <asp:Button ID="Button2" runat="server" Text="Reset" onclick="Button2_Click" /> | |
| </div> | |
| </form> | |
| </body> | |
| </html> |
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