我正在尝试在VB.Net中创建一个类型大小的参数数组:
Dim parameters() As SqlParameter = New SqlParameter() _
{
New SqlParameter("@first_name", SqlDbType.VarChar, 50) {Value = "john"},
New SqlParameter("@last_name", SqlDbType.VarChar, 50) {Value = "doe"},
New SqlParameter("@age", SqlDbType.Int) {Value = 18},
New SqlParameter("@id", SqlDbType.Int) {Value = 123}
}
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但VS说:价值'没有宣布.由于其保护级别,它可能无法访问
上面的代码有什么问题?
谢谢!
我想知道ApplicationException当用户违反某些业务规则时,是否建议使用它来返回应用程序错误.例如:
public void validate(string name, string email)
{
int count1 = (from p in context.clients
where (p.name == clients.name)
select p).Count();
if (count1 > 0)
throw new ApplicationException("Your name already exist in the database");
int count2 = (from p in context.clients
where (p.email == clients.email)
select p).Count();
if (count2 > 0)
throw new ApplicationException("Your e-mail already exist in the database");
}
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这是一个好的或坏的策略?如果不是,那会是更好的方法?
在我的源代码中,使用Visual Studio 2015我想将特定文件夹中的所有javascript调用替换为其最小化文件名.例如:
<script type="text/javascript" src="~/Scripts/common/filename1.js"></script>
<script type="text/javascript" src="~/Scripts/common/filename2.js"></script>
<script type="text/javascript" src="~/Scripts/common/filename3.js"></script>
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我想替换为:
<script type="text/javascript" src="~/Scripts/common/filename1.min.js"></script>
<script type="text/javascript" src="~/Scripts/common/filename2.min.js"></script>
<script type="text/javascript" src="~/Scripts/common/filename3.min.js"></script>
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我使用以下表达式:
我应该在"替换为"字段中添加什么?