Validation

@{

    Validation.RequireField("title", "You must enter a title");
    Validation.RequireField("genre", "Genre is required");
    Validation.RequireField("year", "You haven't entered a year");

    var title = "";
    var genre = "";
    var year = "";

    if(IsPost && Validation.IsValid()){
       title = Request.Form["title"];
       genre = Request.Form["genre"];
       year = Request.Form["year"];

       var db = Database.Open("WebPagesMovies");
       var insertCommand = "INSERT INTO Movies (Title, Genre, Year) Values(@0, @1, @2)";
       db.Execute(insertCommand, title, genre, year);
       Response.Redirect("~/Movies");
    }
}

<!DOCTYPE html>
<html>
<head>
<metacharset="utf-8"/>
<title>Add a Movie</title>
     
<styletype="text/css">
   
.field-validation-error {
     
font-weight:bold;
     
color:red;
     
background-color:yellow;
     
}
   
.validation-summary-errors{
     
border:2px dashed red;
     
color:red;
     
background-color:yellow;
     
font-weight:bold;
     
margin:12px;
   
}
 
</style>
</head>
<body>
 
<h1>Add a Movie</h1>
  @Html.ValidationSummary()
 
<formmethod="post">
   
<fieldset>
     
<legend>Movie Information</legend>
     
<p><labelfor="title">Title:</label>
         
<inputtype="text"name="title"value="@Request.Form["title"]"/>
          @Html.ValidationMessage("title")
     
</p>

     
<p><labelfor="genre">Genre:</label>
         
<inputtype="text"name="genre"value="@Request.Form["genre"]"/>
         @Html.ValidationMessage("genre")
     
</p>

     
<p><labelfor="year">Year:</label>
         
<inputtype="text"name="year"value="@Request.Form["year"]"/>
          @Html.ValidationMessage("year")
     
</p>

     
<p><inputtype="submit"name="buttonSubmit"value="Add Movie"/></p>
   
</fieldset>
 
</form>
</body>
</html>

 

1.设置表单元素必填

  Validation.RequireField("title", "You must enter a title");

2.显示ERRO

 @Html.ValidationMessage("title")

3.显示所有ERRO

@Html.ValidationSummary()

4.判断是否验证通过

if(Validation.IsValid())
        {
            world="posted";
        }

5.erro 样式定义

 <styletype="text/css">
   
.field-validation-error {
     
font-weight:bold;
     
color:red;
     
background-color:yellow;
     
}
   
.validation-summary-errors{
     
border:2px dashed red;
     
color:red;
     
background-color:yellow;
     
font-weight:bold;
     
margin:12px;
   
}
 
</style>

 6.手动添加验证信息

Validation.AddFormError("No movie was selected.");

@{
    var title = "";
    var genre = "";
    var year = "";
    var movieId = "";

    if(!IsPost){
        if(!Request.QueryString["ID"].IsEmpty()){
            movieId = Request.QueryString["ID"];
            var db = Database.Open("WebPagesMovies");
            var dbCommand = "SELECT * FROM Movies WHERE ID = @0";
            var row = db.QuerySingle(dbCommand, movieId);
            title = row.Title;
            genre = row.Genre;
            year = row.Year;
        }
        else{
            Validation.AddFormError("No movie was selected.");
            // If you are using a version of ASP.NET Web Pages 2 that's
            // earlier than the RC release, comment out the preceding
            // statement and uncomment the following one.
            //ModelState.AddFormError("No movie was selected.");
        }
    }
}

posted @ 2013-10-12 17:34  不喝啤酒的小啤酒  阅读(581)  评论(0编辑  收藏  举报