data-annotations

问题 I am using Kendo UI Grid with ASP.NET MVC Helpers and auto generated columns. I have [DefaultValue(60 * 60)] annotation in my view model but Kendo helpers doesn't seem to respect that. Can I have default value specified (probably with data annotations) without having to manually describe the columns? 回答1: if you defined the columns in the grid manually, you need to set the default value like this despite you defined the default value in the annotation or not @(Html.Kendo() .Grid() .DataSource

问题 I am using Kendo UI Grid with ASP.NET MVC Helpers and auto generated columns. I have [DefaultValue(60 * 60)] annotation in my view model but Kendo helpers doesn't seem to respect that. Can I have default value specified (probably with data annotations) without having to manually describe the columns? 回答1: if you defined the columns in the grid manually, you need to set the default value like this despite you defined the default value in the annotation or not @(Html.Kendo() .Grid() .DataSource

问题 I'd like to set a default value to my model in Controller, But It cannot display in create page. TestModel code: public class TestModel { [DataType(DataType.DateTime), Required] [DisplayFormat(DataFormatString = "yyyy/MM/dd", ApplyFormatInEditMode = true)] public DateTime StartTime { get; set; } [DataType(DataType.DateTime), Required] [DisplayFormat(DataFormatString = "yyyy/MM/dd", ApplyFormatInEditMode = true)] public DateTime EndTime { get; set; } public string Description { get; set; } }

问题 I have my asp.net mvc 3 application with entity framework and i used the Database First model to set it up. My Steps below: 1. Genarated a database with tables 2. Created ADO.NET Entity Data Model file (.edmx) and imported the tables 3. inside the design i added a Code Generation item and used ADO.NET DbContext Generator 4. a Model1.tt holder as been made with all of the tables Models I have edited the models and updated them with DataAnnotations Attributes (just for the example a well known

问题 I want to make VM_hostname,datetime and name properties as a composite Key for Disk class . At the same time VM_hostname and datetime of Disk class should refer to VM_hostname and datetime of VirtualMachine class (ie Foreign keys) . I did this but it gives me this exception : The ForeignKeyAttribute on property 'datetime' on type 'WebJob1.Historical.Disk' is not valid. The navigation property 'Datetime' was not found on the dependent type 'WebJob1.Historical.Disk'. The Name value should be a

问题 I want to make VM_hostname,datetime and name properties as a composite Key for Disk class . At the same time VM_hostname and datetime of Disk class should refer to VM_hostname and datetime of VirtualMachine class (ie Foreign keys) . I did this but it gives me this exception : The ForeignKeyAttribute on property 'datetime' on type 'WebJob1.Historical.Disk' is not valid. The navigation property 'Datetime' was not found on the dependent type 'WebJob1.Historical.Disk'. The Name value should be a

问题 I want to make VM_hostname,datetime and name properties as a composite Key for Disk class . At the same time VM_hostname and datetime of Disk class should refer to VM_hostname and datetime of VirtualMachine class (ie Foreign keys) . I did this but it gives me this exception : The ForeignKeyAttribute on property 'datetime' on type 'WebJob1.Historical.Disk' is not valid. The navigation property 'Datetime' was not found on the dependent type 'WebJob1.Historical.Disk'. The Name value should be a

问题 I want to make VM_hostname,datetime and name properties as a composite Key for Disk class . At the same time VM_hostname and datetime of Disk class should refer to VM_hostname and datetime of VirtualMachine class (ie Foreign keys) . I did this but it gives me this exception : The ForeignKeyAttribute on property 'datetime' on type 'WebJob1.Historical.Disk' is not valid. The navigation property 'Datetime' was not found on the dependent type 'WebJob1.Historical.Disk'. The Name value should be a

问题 I want to make VM_hostname,datetime and name properties as a composite Key for Disk class . At the same time VM_hostname and datetime of Disk class should refer to VM_hostname and datetime of VirtualMachine class (ie Foreign keys) . I did this but it gives me this exception : The ForeignKeyAttribute on property 'datetime' on type 'WebJob1.Historical.Disk' is not valid. The navigation property 'Datetime' was not found on the dependent type 'WebJob1.Historical.Disk'. The Name value should be a

问题 ** What I want to do is remove the red box in 5000 images. I wrote a piece of python code for one sample image, but I don't know where got something wrong. I can't realize such purpose. I appreciate any other way to solve this problem.This is the sample image ** ''' import cv2 import numpy as np img = cv2.imread(r'C:\Users\lenvov\Desktop\baowenti\2.jpg') # 缩放 rows, cols, channels = img.shape img = cv2.resize(img, None, fx=0.5, fy=0.5) img_hsv=cv2.cvtColor(img, cv2.COLOR_BGR2HSV) # lower mask