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我正在创建一个系统,用户可以在该系统中创建要完成的新任务,每个任务都有多个步骤。这一切都是通过一个输入表单完成的,顶部的部分用于输入任务详细信息(名称、描述等),下面的部分用于输入每个步骤的名称和描述。可以使用一个按钮添加步骤,该按钮在单击时通过 ajax 创建一组新的控件,允许用户根据需要执行尽可能多的步骤。

当模型被传回时,控制器会正确拾取输入(它们存储在列表中),但是在我的代码中的某个地方我有一个问题,因为不是在我的数据库的步骤表中创建一个新步骤,而是而是创建了重复的任务。所以我最终创建了(1 + 步骤数)任务并且没有步骤。

我希望这对人们有意义。我正在使用 MySQL 和我编写的自定义 MySQL 类来处理存储过程。我对 c#、.NET 框架和 MVC 模型非常陌生,所以我可能在构建我的代码时都错了,并且可能正在以艰难的方式做事,但这里就是这样。

这是我的代码:

控制器:

[HttpPost]
    public ActionResult Index(TaskCreateModel i)
    {            
        if (!ModelState.IsValid)
        {
            ModelState.AddModelError("", "Please fill the required fields. All tasks require at least 1 step.");
            return View(i);
        }

        //write task to the database
        var proc = new StoredProcService("create_task");
        proc.AddParam(new MySqlParameter("Name", MySqlDbType.VarChar),i.Name);
        proc.AddParam(new MySqlParameter("Description", MySqlDbType.VarChar),i.Description);
        proc.AddParam(new MySqlParameter("Value", MySqlDbType.Float),i.Value);
        proc.DoQuery();


        foreach (var item in i.Steps)
        {
            //add steps
            var proc_steps = new StoredProcService("create_task_step");
            proc_steps.AddParam(new MySqlParameter("Name", MySqlDbType.VarChar), item.Name);
            proc_steps.AddParam(new MySqlParameter("Description", MySqlDbType.VarChar), item.Description);
            proc_steps.AddParam(new MySqlParameter("taskID", MySqlDbType.Int32), proc.Results.ElementAt(0));
            proc.DoQuery();
        }
        return View();
    }

存储过程服务:

public class StoredProcService
{
    private MySqlConnection Connect;
    private MySqlCommand CMD;
    public List<Object> Results { get; private set; }

    public StoredProcService(string name, params MySqlParameter[] args)
    {
        QuerySetup(name);

        foreach (var item in args)
        {
            AddParam(item);
        }

        DoQuery();
    }

    public StoredProcService(string name)
    {
        QuerySetup(name);
    }

    //used by all constructors
    private void QuerySetup(string name)
    {
        Connect = new MySqlConnection(ConfigurationManager.ConnectionStrings[<my actual connetion string is here>].ConnectionString);
        CMD = new MySqlCommand(name, Connect);
        CMD.CommandType = CommandType.StoredProcedure;
    }

    public void AddParam(MySqlParameter p,object pval)
    {
        CMD.Parameters.Add(p).Value = pval;
    }

    public void AddParam(MySqlParameter p)
    {
        CMD.Parameters.Add(p);
    }

    public void DoQuery()
    {
        Results = new List<Object>();
        MySqlDataReader myReader;

        Connect.Open();

        myReader = CMD.ExecuteReader();
        int count = 0;
        while (myReader.Read())
        {
            Results.Add(myReader.GetValue(count));
            count++;
        }

        myReader.Close();
        Connect.Close();
    }
}

使用的型号:

public class TaskCreateModel
{

    [Required]
    [Display(Name = "Task Name")]
    public string Name { get; set; }

    [Display(Name = "Task Description")]
    public string Description { get; set; }

    [Required]
    [Display(Name = "Task Value")]
    [DisplayFormat(DataFormatString = "${0:F2}")]
    public float Value { get; set; }

    [Required]
    public List<StepCreateModel> Steps { get; set; }

}

public class StepCreateModel
{
    [Required]
    [Display(Name = "Step Name")]
    public string Name { get; set; }

    [Required]
    [Display(Name = "Description")]
    public string Description { get; set; }
}

意见:

@model ExampleProject.Models.TaskCreateModel
@{
    ViewBag.Title = "Create Task";
}

<h2>@ViewBag.Title</h2>
@using (Html.BeginForm("index", "CreateTask"))
{
    @Html.ValidationSummary(true)
    <fieldset>
        <legend>
            Please enter task details below:
        </legend>
        @Html.Partial("_CreateTaskPartial")
        <input type="submit" value="Create Task" />
    </fieldset>
    <fieldset>
        <legend>
            Steps
        </legend>
        <div id="editorRows">

        </div>
        @Ajax.ActionLink("Add Step","BlankEditorRow", new AjaxOptions{ InsertionMode= System.Web.Mvc.Ajax.InsertionMode.InsertAfter,
                                                            HttpMethod="Get", UpdateTargetId="editorRows"})
        @Html.EditorFor(x => x.Steps)
    </fieldset>
}

这是上一个视图中调用的部分视图(我没有发布 AJAX 调用的视图,因为我的 ajax 工作正常)

@model ExampleProject.Models.TaskCreateModel

<ul>
    <li>
        @Html.LabelFor(m => m.Name)
        @Html.TextBoxFor(m => m.Name)
        @Html.ValidationMessageFor(m => m.Name)
    </li>
    <li>
        @Html.LabelFor(m => m.Description)
        @Html.TextBoxFor(m => m.Description)
        @Html.ValidationMessageFor(m => m.Description)
    </li>
    <li>
        @Html.LabelFor(m => m.Value)
        @Html.TextBoxFor(m => m.Value)
        @Html.ValidationMessageFor(m => m.Value)
    </li>
</ul>

存储过程:

DELIMITER $$

CREATE DEFINER=`<me>`@`localhost` PROCEDURE `create_task`(in name VARCHAR(128), in description VARCHAR(255), in value FLOAT)
BEGIN
    INSERT INTO tasks (Name,Description,Value)
    VALUES (name,description,value);
    SELECT LAST_INSERT_ID() as TaskID;
END

CREATE DEFINER=`<me>`@`localhost` PROCEDURE `create_task_step`(in Name varchar(128), in Description VARCHAR(255), in TaskID INT)
BEGIN
    INSERT INTO steps (name,description,taskID)
    VALUES (Name, Description, TaskID);
    SELECT LAST_INSERT_ID() as StepID;
END
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1 回答 1

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啊啊啊啊啊啊我修好了。我不小心使用了 proc.DoQuery 而不是 proc_steps.DoQuery。

它现在完美无缺

于 2013-07-08T23:18:05.027 回答