小编Moh*_*eem的帖子

public interface ITest
{
    int ChildCount { get; set; }
}

public class Test
{
}

public class OrderPool : ITest, Test
{
    public int ChildCount
    {
        get;
        set;
    }
}

错误说Base类'Test'必须在任何接口之前.为什么有必要先扩展类然后实现接口？

我有一个post build事件,写入一个文本文件.当我从Visual Studio构建项目时它工作正常.但是当我使用msbuild.exe时,Post构建事件不会写入文件.我正在使用带有以下参数的msbuild:

msbuild.exe TestProj.Web.csproj /p:Configuration=Release /p:OutDir=C:\TestProj\bin\ /p:WebProjectOutputDir=C:\TestProj\ /p:DebugSymbols=false /p:DebugType=None

post build事件如下所示:

  <PropertyGroup Condition="'$(BUILD_NUMBER)'==''">
    <COMPUTERNAME>None</COMPUTERNAME>
    <BRANCH>None</BRANCH>
    <BUILD_NUMBER>None</BUILD_NUMBER>
  </PropertyGroup>
  <Target Name="AfterBuild">
    <WriteLinesToFile File="$(ProjectDir)$(OutputPath)\VersionInfo.txt" Overwrite="true" Lines="Project&#xD;&#xA;Created On $(COMPUTERNAME)&#xD;&#xA;Branch is $(BRANCH)&#xD;&#xA;Version Is $(BUILD_NUMBER)" />
  </Target>

我试过Application_Error像这样的代码

Session["mysession"] = "Some message";

但问题是有时会话不可用Application_Error.所以我想检查会话是否可用.

我试图使用Liquibase部署数据库更改并在其中一个存储过程代码上获得以下错误.

SET NOCOUNT ON: Incorrect syntax near 'ON'.
    at liquibase.executor.jvm.JdbcExecutor.execute(JdbcExecutor.java:62)
    at liquibase.executor.jvm.JdbcExecutor.execute(JdbcExecutor.java:104)
    at liquibase.database.AbstractDatabase.execute(AbstractDatabase.java:1075)
    at liquibase.database.AbstractDatabase.executeStatements(AbstractDatabase.java:1059)
    at liquibase.changelog.ChangeSet.execute(ChangeSet.java:317)
    ... 5 more
Caused by: com.microsoft.sqlserver.jdbc.SQLServerException: Incorrect syntax near 'ON'.
    at com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDatabaseError(SQLServerException.java:197)
    at com.microsoft.sqlserver.jdbc.SQLServerStatement.getNextResult(SQLServerStatement.java:1493)
    at com.microsoft.sqlserver.jdbc.SQLServerStatement.doExecuteStatement(SQLServerStatement.java:775)
    at com.microsoft.sqlserver.jdbc.SQLServerStatement$StmtExecCmd.doExecute(SQLServerStatement.java:676)
    at com.microsoft.sqlserver.jdbc.TDSCommand.execute(IOBuffer.java:4575)
    at com.microsoft.sqlserver.jdbc.SQLServerConnection.executeCommand(SQLServerConnection.java:1400)
    at com.microsoft.sqlserver.jdbc.SQLServerStatement.executeCommand(SQLServerStatement.java:179)
    at com.microsoft.sqlserver.jdbc.SQLServerStatement.executeStatement(SQLServerStatement.java:154)
    at com.microsoft.sqlserver.jdbc.SQLServerStatement.execute(SQLServerStatement.java:649)
    at liquibase.executor.jvm.JdbcExecutor$1ExecuteStatementCallback.doInStatement(JdbcExecutor.java:92)
    at liquibase.executor.jvm.JdbcExecutor.execute(JdbcExecutor.java:55)

sp看起来像:

    CREATE PROCEDURE [dbo].[TestSP] 
    AS
    BEGIN

        SET NOCOUNT ON;


        SELECT Col1, Col2
        FROM dbo.[Table1] 

    END
    GO
GRANT EXECUTE ON [dbo].[testsp] TO [SomeRole]
GO

变更集看起来像:

<?xml version="1.0" encoding="utf-8"?>
<databaseChangeLog xmlns="http://www.liquibase.org/xml/ns/dbchangelog" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" …

SELECT [SomeColumn]
FROM [Table1] t1 
WHERE Table1ID = (
        SELECT [Table1ID]
        FROM [Table2] t2 
        WHERE t2.ID = 2
        OPTION (MAXDOP 4)
        )
OPTION (MAXDOP 4)

这会在子查询中Incorrect syntax near the keyword 'OPTION'.首先出现错误OPTION (MAXDOP) 是否可以使用OPTION (MAXDOP？或者最终OPTION (MAXDOP)将足以设置子查询的程度.

当我尝试从C#代码执行下面的存储过程时,我得到一个SQLException"操作数类型碰撞:int与uniqueidentifier不兼容".

create proc sp_Get_Allfields_Account_Public
@username varchar(20),
@password varchar(20),
@acc_num UniqueIdentifier out,
@cust_name varchar(20) out,
@balance float out
as
select @acc_num=acc_num,@cust_name=cust_name,@balance=balance from Account_Public where username=@username and password=@password

C#代码如下

cmd = new SqlCommand("sp_Get_Allfields_Account_Public", con);
               cmd.CommandType = CommandType.StoredProcedure;

               // Add Input Parameters
               cmd.Parameters.AddWithValue("@username", username);
               cmd.Parameters.AddWithValue("@password", password);   

               // Add output parameters
               cmd.Parameters.AddWithValue("@acc_num", SqlDbType.UniqueIdentifier);
               cmd.Parameters["@acc_num"].Direction = ParameterDirection.Output;

               cmd.Parameters.AddWithValue("@cust_name", SqlDbType.VarChar);
               cmd.Parameters["@cust_name"].Direction = ParameterDirection.Output;

               cmd.Parameters.AddWithValue("@balance", SqlDbType.Float);
               cmd.Parameters["@balance"].Direction = ParameterDirection.Output;

               cmd.ExecuteNonQuery();

表定义

create table Account_Public
(
acc_num uniqueidentifier,
cust_name varchar(20),
username varchar(20),
password varchar(20),
balance float
)

我正在尝试使用 Teamcity REST API 创建一个 VCS Root。按照REST 文档，我将在 XML 下方发布到http://TeamcityServer/httpAuth/app/rest/vcs-roots

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<vcs-root name="TestVCS" vcsName="svn" modificationCheckInterval="5" href="/httpAuth/app/rest/vcs-roots/id:TestVCS">
    <project id="TestProject" name="&lt;Root project&gt;" href="/httpAuth/app/rest/projects/id:TestProject"/>
    <properties>
        <property name="externals-mode" value="externals-full"/>
        <property name="labelingMessage" value="Labeled automatically by TeamCity"/>
        <property name="labelingPatterns" value="trunk=&gt;tags"/>
        <property name="svn-config-directory" value="C:\Windows\system32\config\systemprofile\AppData\Roaming\Subversion"/>
        <property name="svn-use-default-config-directory" value="true"/>
        <property name="url" value="https://svn-uat.net/TestProject"/>
        <property name="user" value="testuser"/>
        <property name="password" value="testpwd"/>
        <property name="working-copy-format" value="1.6"/>
    </properties>
    <vcsRootInstances href="/httpAuth/app/rest/vcs-root-instances?locator=vcsRoot:(id:TestVCS)"/>
</vcs-root>

这将创建 VCS 根，但密码属性仍为空。我尝试使用 明确设置密码http://TeamcityServer/httpAuth/app/rest/vcs-roots/VCSId/properties/password，但即使这样似乎也没有为 VCS 根设置密码。

我正在使用System.Windows.Forms.RichTextBox和做类似的事情

RichTextBox1.Text = "Hello World";

但在此语句之后,RichTextBox中的光标位置仍然在开头.有没有办法将它设置到最后？

我想写一个像C#的方法

public bool PowershellExists()
{
    // Returns true if PowerShell exists on the machine, else false.
}

class Person
{
    string name;

    public Person(string name)
    {
        this.name = name;
    }

    public void method()
    {
        Person gupta = new Person("James"); // Current Object
        Console.WriteLine(this.name);
        Person gupta1 = new Person("Peter");  // Current Object
        Console.WriteLine(this.name);
        Person gupta2 = new Person("Frank");  // Current Object
        Console.WriteLine(this.name);
    }

    static void Main(string[] args)
    {
        Person p = new Person("Jim");
        p.method();
        Console.ReadLine();
    }
}

这段代码产生了结果

Jim
Jim
Jim

但是,如果认为这应该是

James
Peter
Frank

有人可以解释一下吗？