如何在C#中显示确认对话框并使用结果

时间:2014-07-01 14:00:17

标签: c# javascript jquery asp.net

我有一个通用处理程序,在从用户那里获得他们真正想要的确认后,从某个位置删除文件。

我的代码是:

public class DeleteFilePDF : IHttpHandler {

    public void ProcessRequest (HttpContext context) {
        System.Web.HttpRequest request2 = System.Web.HttpContext.Current.Request;
        string strSessVar2 = request2.QueryString["fileVar"];

        //MessageBox.Show(strSessVar2);
        if (File.Exists(strSessVar2))
        {
            DialogResult dlgRes = MessageBox.Show("Do you really want to delete the file?", "Program Message", MessageBoxButtons.YesNo, MessageBoxIcon.Question);
            if (dlgRes == DialogResult.Yes)
            {
                try
                {
                    File.Delete(strSessVar2);
                    HttpContext.Current.Response.Redirect("PDFAllFilesDisplay.aspx", false);
                }
                catch (Exception ce)
                {
                }
            }
        }
    }

    public bool IsReusable {
        get {
            return false;
        }
    }
}

我的ImageButton代码:

<asp:ImageButton runat="server" ToolTip="Delete File" ID="lnkDelete" OnClick="DeleteFile" CommandArgument='<%# Container.DataItemIndex %>' ImageUrl="~/delete.png" Width="50px" Height="50px" />

我的ImageButton代码隐藏:

protected void DeleteFile(object sender, EventArgs e)
    {
        string strFile = GridView1.Rows[Convert.ToInt32(((ImageButton)sender).CommandArgument.ToString())].Cells[0].Text;
        string strFolderFile = strDirectory + strFile;
        //MessageBox.Show(strFolderFile);
        Response.Redirect("DeleteFilePDF.ashx?fileVar=" + strFolderFile);
    }

在调试环境中一切正常,但除此之外我无法使用MessageBox.Show()函数。如何使用JQuery / JavaScript确认对话框实现相同的功能?

2 个答案:

答案 0 :(得分:1)

从javascript和流程服务器获取确认点击

<asp:ImageButton runat="server" OnClientClick="return getConfirmation()" 
     ToolTip="Delete File" ID="lnkDelete" OnClick="DeleteFile" 
     CommandArgument='<%# Container.DataItemIndex %>' 
     ImageUrl="~/delete.png" Width="50px" Height="50px" />

然后JS代码

  function getConfirmation(){
    return window.confirm("Do you really want to delete the file?");
  }

有一些不错的用户界面可用于显示确认框。查看jQuery Modal对话框或bootstrap bootbox等

答案 1 :(得分:1)

您不能这样做,因为您的处理程序在服务器上执行。相反,您将不得不使用JavaScript来决定是否删除该文件。例如:

<input type="button" onclick="deleteFile()" value="Delete File" title="Press to delete file" />

function deleteFile {
    //show dialog with jquery or anything similar
    //if yes is selected, then make the handler call using ajax. for example using jquery ajax: 
   $.ajax({ url: [handler url] + [query string], method: "post" });
}