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Using C# with ASP.NET on an Intranet website. I've got multiple "Admin" pages where I'm checking fields to make sure a date is present, checking fields to make sure the Username is present and filling in those fields if they were left blank. On all of these pages, there exists fields with identical names. The block of code I'm using in the code-behind is below:

        //If the User fields are empty, set them to the current user
        string ActiveUser = System.Web.HttpContext.Current.User.Identity.Name;
        string LoginID = ActiveUser.Right(6);

        var txtLoadedBy_chk = string.IsNullOrEmpty(str5);
        if ((txtLoadedBy_chk == true))
        {
            str5 = LoginID;
        }
        var txtUpdatedBy_chk = string.IsNullOrEmpty(str7);
        if ((txtUpdatedBy_chk == true))
        {
            str7 = LoginID;
        }
        var txtFlgUpdatedBy_chk = string.IsNullOrEmpty(str9);
        if ((txtFlgUpdatedBy_chk == true))
        {
            str9 = LoginID;
        }

        // If the date fields are NULL, set them to today's date
        var txtLoadedOn_chk2 = string.IsNullOrEmpty(str6);
        if ((txtLoadedOn_chk2 == true))
        {
            str6 = DateTime.Today.ToString();
        }
        var txtUpdatedOn_chk2 = string.IsNullOrEmpty(str8);
        if ((txtUpdatedOn_chk2 == true))
        {
            str8 = DateTime.Today.ToString();
        }
        var txtFlgUpdatedOn_chk2 = string.IsNullOrEmpty(str10);
        if ((txtFlgUpdatedOn_chk2 == true))
        {
            str10 = DateTime.Today.ToString();
        }

        // Check to make sure the dates entered are valid.  If not, let the user know and
        //   then exit out of the code so the record is not saved
        var txtLoadedOn_chk = DateTimeHelpers.IsValidSqlDateTimeNative(str6);
        var txtUpdatedOn_chk = DateTimeHelpers.IsValidSqlDateTimeNative(str8);
        var txtFlgUpdatedOn_chk = DateTimeHelpers.IsValidSqlDateTimeNative(str10);

        if ((txtLoadedOn_chk == false) || (txtUpdatedOn_chk == false) || (txtFlgUpdatedOn_chk == false))
        {
            Page.ClientScript.RegisterStartupScript(this.GetType(), "ch", "<script>alert('WARNING !! One of your date fields is invalid')</script>");
            return;
        }

I'm thinking that since I do the EXACT same checks on all of these forms, I should be able to put this block of code somewhere and just reference it, instead of putting it in every form. How would I go about doing that? If I put it in a separate page or CS file, how will it know which form is calling it so it reads the proper fields? If you can provide some sample code, that would be a huge help. TIA!

Oh, and DateTimeHelpers is a class I created, in case you're wondering.

EDIT: I just want to be clear on something; this code is in the code-behind and is called when the user presses the "Save" button. It's just verifying the data before it tries to write it to the SQL Server table.

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2 回答 2

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您在这里要做的是创建一个用户控件。您可以使用 Visual Studio 提供的“新文件”内容将其中之一添加到您的项目中。Fields.ascx我将在此答案中调用该用户控件。

您答案中的代码位于该用户控件 ( Fields.ascx.cs) 的代码隐藏中。您在每个页面上拥有的表单元素进入Fields.ascx.

完成此操作后，您可以像这样引用页面顶部的用户控件：

<%@ Register TagPrefix="user2174085" TagName="MyFields" Src="~/Path/To/Fields.ascx" %>

然后使用以下代码将字段添加到页面的正确位置：

<user2174085:MyFields runat="server" />

在该<%@ Register %>部分中，您可以制作任何您想要的TagPrefix东西TagName，只要确保它们在您使用控件时匹配即可。

于 2013-05-13T17:58:29.630 回答
1

您始终可以在 cs 文件中编写公共方法并将控件作为引用变量传递。这是一个可能看起来像的简单示例：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI.WebControls;

namespace mol_intranet
{
    public class ClassTesting
    {

        //pass the fields to be checked/updated here as ref variables
        public void checkFields(ref TextBox loadedby, ref TextBox updatedby)
        {

            string ActiveUser = System.Web.HttpContext.Current.User.Identity.Name;
            string LoginID = ActiveUser.Right(6);

            var txtLoadedBy_chk = string.IsNullOrEmpty(loadedby.Text);
            if ((txtLoadedBy_chk == true))
            {
                loadedby.Text = LoginID;
            }

            var txtUpdatedBy_chk = string.IsNullOrEmpty(updatedby.Text);
            if ((txtUpdatedBy_chk == true))
            {
                updatedby.Text = LoginID;
            }

        }
    }
}

然后只需在您的代码中调用该方法并传递您的控件：

    ClassTesting t = new ClassTesting();
    t.checkFields(txtLoadedBy, txtUpdatedBy);

希望这可以帮助。

于 2013-05-13T18:28:43.903 回答