我在 ASP.NET Core 6 Web API 项目中使用 Dapper,并以 SQL Server 2016 数据库作为后端。Dapper 的方法ExecuteScalar返回错误
System.TimeOnly 类型的成员 DepartureTime 不能用作参数值
有什么解决方法吗?
public virtual int Create(TModel entity)
{
int result = -1;
var insertQuery = QueryGenerator.GenerateInsertQuery(typeof(TModel));
var factory = new SqlServerDbConnectionFactory(connectionString);
var profiler = CustomDbProfiler.Current;
using (var connection = ProfiledDbConnectionFactory.New(factory, profiler))
{
try
{
if (connection.State == ConnectionState.Closed)
{
connection.ConnectionString = connectionString;
connection.Open();
}
result = connection.ExecuteScalar<int>(insertQuery, entity, transaction: null); // Throwing error
}
catch (Exception e)
{
var sql = profiler.GetCommands(); …Run Code Online (Sandbox Code Playgroud) 我想在最后一个选项卡之后插入一个新选项卡。但问题是我不知道当前的最后一个标签是什么;它可能是“Acrobat 阅读器”或其他东西。如何实现这一点。我有以下代码:
<customUI xmlns="http://schemas.microsoft.com/office/2006/01/customui">
<ribbon startFromScratch="false">
<tabs>
<tab id="MyCustomTab" label="MyTab" insertAfterMso="TabView">
<group id="customGroup1" label="First Tab">
<button id="customButton1" label="JG Button 1" imageMso="HappyFace" size="large" onAction="Callback1" />
<button id="customButton2" label="JG Button 2" imageMso="PictureBrightnessGallery" size="large" onAction="Callback2" />
</group>
</tab>
</tabs>
</ribbon>
</customUI>
Run Code Online (Sandbox Code Playgroud) 我使用以下css:
p::first-letter {
font-size: 400%;
line-height: 0;
}
Run Code Online (Sandbox Code Playgroud)
我想减少第一个和第二个字符之间的差距.例如,在这个网站中,我想减少第一个单词'Thakur'中'T'和'h'之间的空间.
我正在使用Entity Framework代码优先方法.我收到以下错误,当我运行Update-Database -script在一个空数据库,运行程序后enable-migrations和add-migration:
standardvba.DataAccessLayer.LessonQuestion :: EntityType'LessonQuestion'没有定义键.定义此EntityType的键.
LessonQuestions:EntityType:EntitySet'LessonQuestions'基于没有定义键的类型'LessonQuestion'.
LessonQuestion.cs:
public partial class LessonQuestion
{
public LessonQuestion()
{
this.LessonQuestionDetails = new List<LessonQuestionDetail>();
}
[Key]
public int QuestionID; // Key is defined
public int OrderNumber;
[ForeignKey("ParentQuestion")]
public int ParentQuestionID;
[ForeignKey("Lesson")]
public int LessonID { get; set; }
[ForeignKey("ActionedBy")]
public int ActionedByUserID { get; set; }
[MaxLength(1000)]
public string Question { get; set; }
public bool IsApproved { get; set; }
[Required] // Sets the CASCADE constraint, …Run Code Online (Sandbox Code Playgroud)