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我想创建数据库和相关表。除了'EmployeeDocuments'表（数据库和4个表格已创建）之外，一切都可以工作。它给出了如下错误：EmployeeDocuments表不能在数据库中创建
数据库中已有一个名为'FK_Employees_Companies1'的对象。
我的代码如下：
private void UserEntryForm_Activated(object sender, EventArgs e)
{
CheckIfDBExist();
}
int i;
private void CheckIfDBExist()
{
SqlConnection tmpConn = new SqlConnection("server=(local)\\SQLEXPRESS;user=sa;pwd=123");
string sqlCreateDBQuery = string.Format("if not exists (select name from sys.databases where name = 'Devrimer_v2222')create database Devrimer_v2222");
SqlCommand sqlCmd = new SqlCommand(sqlCreateDBQuery, tmpConn);
string constr = Tools.Baglanti.ConnectionString.ToString();
try
{
tmpConn.Open();
int sonuc = sqlCmd.ExecuteNonQuery();
if (sonuc != 0)
{
tmpConn.Close();
string query = "if not exists(select * from sys.tables where name = 'Companies' ";
query += ")";
query += "CREATE TABLE [dbo].[Companies]([Id][int] IDENTITY(1, 1) NOT NULL,";
query += "[Name][nvarchar](100) NULL,";
query += "[Adress][nvarchar](500) NULL,";
query += "[TelNo][char](20) NULL,";
query += "[Active][bit] NOT NULL CONSTRAINT[DF_Companies_Active] DEFAULT((1)),";
query += "CONSTRAINT[PK_Companies] PRIMARY KEY CLUSTERED([Id] ASC) WITH(PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF,";
query += "IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON,";
query += "ALLOW_PAGE_LOCKS = ON) ON[PRIMARY]) ON[PRIMARY]";
query += " SET ANSI_PADDING OFF";
using (SqlConnection con = new SqlConnection(constr))
{
using (SqlCommand cmd = new SqlCommand(query))
{
cmd.Connection = con;
con.Open();
cmd.ExecuteNonQuery();
con.Close();
}
}
string docQuery = "if not exists(select * from sys.tables where name = 'Documents' ";
docQuery += ")";
docQuery += "CREATE TABLE [dbo].[Documents]([Id] [int] IDENTITY(1,1) NOT NULL,";
docQuery += "[Name] [nvarchar](50) NULL,";
docQuery += "[Description] [nvarchar](500) NULL,";
docQuery += "[ValidPeriod] [int] NULL,";
docQuery += "[PeriodType] [nchar](10) NULL,";
docQuery += "[Active] [bit] NOT NULL CONSTRAINT [DF_Documents_Active] DEFAULT ((1)), ";
docQuery += "CONSTRAINT [PK_Documents] PRIMARY KEY CLUSTERED ( [Id] ASC)WITH (PAD_INDEX = OFF, ";
docQuery += "STATISTICS_NORECOMPUTE = OFF, ";
docQuery += "IGNORE_DUP_KEY = OFF, ";
docQuery += "ALLOW_ROW_LOCKS = ON, ";
docQuery += " ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]) ON [PRIMARY]";
using (SqlConnection con = new SqlConnection(constr))
{
using (SqlCommand cmd = new SqlCommand(docQuery))
{
cmd.Connection = con;
con.Open();
cmd.ExecuteNonQuery();
con.Close();
}
}
string EmpQuery = "if not exists(select * from sys.tables where name = 'Employees' ";
EmpQuery += ")";
EmpQuery += "CREATE TABLE [dbo].[Employees]([Id] [int] IDENTITY(1,1) NOT NULL,";
EmpQuery += "[Name] [nvarchar](50) NULL,";
EmpQuery += "[SurName] [nvarchar](50) NULL,";
EmpQuery += "[Title] [nvarchar](50) NULL,";
EmpQuery += "[Gender] [tinyint] NULL,";
EmpQuery += "[MaritalStatus] [tinyint] NULL,";
EmpQuery += "[Tckn] [char](11) NULL,";
EmpQuery += "[ReportTo] [int] NULL,";
EmpQuery += "[BirthDate] [date] NULL, ";
EmpQuery += "[TelNo] [char](20) NULL, ";
EmpQuery += "[Adress] [nvarchar](500) NULL, ";
EmpQuery += "[Email] [nvarchar](250) NULL, ";
EmpQuery += "[CompanyID] [int] NULL,";
EmpQuery += "[StartWorkingDate] [date] NULL, ";
EmpQuery += "[Active] [bit] NOT NULL CONSTRAINT [DF_Employees_Active] DEFAULT ((1)), ";
EmpQuery += " CONSTRAINT [PK_Employees] PRIMARY KEY CLUSTERED ([Id] ASC)WITH (PAD_INDEX = OFF, ";
EmpQuery += "STATISTICS_NORECOMPUTE = OFF, ";
EmpQuery += "IGNORE_DUP_KEY = OFF, ";
EmpQuery += "ALLOW_ROW_LOCKS = ON, ";
EmpQuery += "ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]) ON [PRIMARY] ";
EmpQuery += ";";
EmpQuery += "SET ANSI_PADDING OFF ";
EmpQuery += "ALTER TABLE [dbo].[Employees] WITH CHECK ADD CONSTRAINT [FK_Employees_Companies1] FOREIGN KEY([CompanyID]) REFERENCES [dbo].[Companies] ([Id]) ";
EmpQuery += ";";
EmpQuery += "ALTER TABLE [dbo].[Employees] CHECK CONSTRAINT [FK_Employees_Companies1] ";
using (SqlConnection con = new SqlConnection(constr))
{
using (SqlCommand cmd = new SqlCommand(EmpQuery))
{
cmd.Connection = con;
con.Open();
cmd.ExecuteNonQuery();
con.Close();
}
}
string userQuery = "if not exists(select * from sys.tables where name = 'Users' ";
userQuery += ")";
userQuery += "CREATE TABLE [dbo].[Users]( [Id] [int] IDENTITY(1,1) NOT NULL, ";
userQuery += "[EmployeID] [int] NULL, ";
userQuery += "[UserName] [nvarchar](50) NULL, ";
userQuery += "[Password] [nchar](10) NULL, ";
userQuery += "[Active] [bit] NOT NULL CONSTRAINT [DF_Users_Aktif] DEFAULT ((1)), ";
userQuery += " CONSTRAINT [PK_Users] PRIMARY KEY CLUSTERED ([Id] ASC)WITH (PAD_INDEX = OFF, ";
userQuery += "STATISTICS_NORECOMPUTE = OFF, ";
userQuery += "IGNORE_DUP_KEY = OFF, ";
userQuery += "ALLOW_ROW_LOCKS = ON,";
userQuery += "ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]) ON [PRIMARY] ";
using (SqlConnection con = new SqlConnection(constr))
{
using (SqlCommand cmd = new SqlCommand(userQuery))
{
cmd.Connection = con;
con.Open();
cmd.ExecuteNonQuery();
con.Close();
}
}
string docEmpQuery = "if not exists(select * from sys.tables where name = 'EmployeeDocuments' ";
docEmpQuery += ")";
docEmpQuery += "CREATE TABLE [dbo].[EmployeeDocuments]([EmployeeID] [int] NOT NULL, ";
docEmpQuery += "[DocumentID] [int] NOT NULL, ";
docEmpQuery += "[GivenDate] [date] NULL, ";
docEmpQuery += "[LastValidDate] [date] NULL, ";
docEmpQuery += "CONSTRAINT [PK_EmployeeDocuments] PRIMARY KEY CLUSTERED ([EmployeeID] ASC, ";
docEmpQuery += "[DocumentID] ASC)WITH (PAD_INDEX = OFF, ";
docEmpQuery += "STATISTICS_NORECOMPUTE = OFF, ";
docEmpQuery += "IGNORE_DUP_KEY = OFF, ";
docEmpQuery += "ALLOW_ROW_LOCKS = ON,";
docEmpQuery += "ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]) ON [PRIMARY]";
docEmpQuery += ";";
docEmpQuery += "ALTER TABLE [dbo].[EmployeeDocuments] WITH CHECK ADD CONSTRAINT [FK_EmployeeDocuments_Documents1] FOREIGN KEY([DocumentID])REFERENCES [dbo].[Documents] ([Id]) ";
docEmpQuery += ";";
docEmpQuery += "ALTER TABLE [dbo].[EmployeeDocuments] CHECK CONSTRAINT [FK_EmployeeDocuments_Documents1] ";
docEmpQuery += "; ";
docEmpQuery += "ALTER TABLE [dbo].[EmployeeDocuments] WITH CHECK ADD CONSTRAINT [FK_EmployeeDocuments_Employees1] FOREIGN KEY([EmployeeID]) REFERENCES [dbo].Employees] ([Id]) ";
docEmpQuery += ";";
docEmpQuery += "ALTER TABLE [dbo].[EmployeeDocuments] CHECK CONSTRAINT [FK_EmployeeDocuments_Employees1] ";
using (SqlConnection con = new SqlConnection(constr))
{
using (SqlCommand cmd = new SqlCommand(docEmpQuery))
{
cmd.Connection = con;
con.Open();
cmd.ExecuteNonQuery();
con.Close();
}
}
}
}
catch (Exception hata)
{
MessageBox.Show(string.Format(sqlCmd.CommandText.ToString() + "\n\nHata: " + hata.Message.ToString()));
}
finally
{
tmpConn.Close();
}
}
}
到目前为止，我还没有更好的办法。 ver有用的工具，我已经使用https://mydbutils.codeplex.com/感谢所有帮助我们业余爱好者的人。 –