1

我一直在运行代码/调试器，甚至设置断点，这样我就可以单步执行代码并且无法找到我知道的语法错误在哪里，在这个 C# 方法中用于在 c-tree 中创建新表数据库。

这是代码：

/*
   Define() method
   where specific data definitions are established also will include the definition of the table 
   being created as well as defining rows and columns of the table
*/
public static void Define()
{
    Console.WriteLine("DEFINE");

    try
    {
        //Creation of the table with the specified data types and the column Names 
        Console.WriteLine("\tCreating table...");

        cmd.CommandText = "CREATE TABLE testData (" +
           "Trackingid VARCHAR(35)," +
           "dates DATETIME," +
           "Name_Of_Recipient VARCHAR(35)," +
           "addresss VARCHAR(35)," +
           "address2 VARCHAR(31)," +
           "City VARCHAR(34)," +
           "Town VARCHAR(23)," +
           "states VARCHAR(5)," +
           "ZipCode INT )";
        cmd.ExecuteNonQuery();

    }
    catch(CtreeSqlException e)
    {
        Console.WriteLine(e + " could not define this table");
    }
    catch(Exception e)
    {
        Console.WriteLine(e + "Error the table could not be defined");
    }
}

就像我之前提到的那样，我多次尝试单步执行代码，我假设我可能有很多列条目？还是严重依赖 VARCHAR 数据类型？

抛出异常消息：

"        Creating table...
Ctree.Data.SqlClient.CtreeSqlException (0x7FFFB1DD): Syntax error ---> Ctree.SqlClient.Common.FcSqlException: Syntax error
   at Ctree.SqlClient.FcSqlXApi.SQLExec(FcStatement stmt, Int32 InStatementType, FcSqlDA ida, FcSqlDA oda, FcSqlCA sqlca)
   at Ctree.SqlClient.FcSqlXApi.Prepare(FcStatement stmt, FcSqlDA input_sqlda, FcSqlDA output_sqlda, Int32 fetchSize)
   at Ctree.SqlClient.FcConnection.Prepare(FcStatement statement, FcSqlDA inputDA, FcSqlDA outputDA, Int32 fetchSize)
   at Ctree.SqlClient.FcPreparedStatement..ctor(FcConnection connexion, String sql, Int32 fetchSize, Int32 timeout)
   at Ctree.Data.SqlClient.CtreeSqlCommand.InternalPrepare(Boolean resultSet)
   at Ctree.Data.SqlClient.CtreeSqlCommand.ExecuteNonQuery()
   at Ctree.Data.SqlClient.CtreeSqlCommand.ExecuteNonQuery()
   at DBbeta.Program.Define() in C:\Users\WVX0DYQ\source\repos\DBbeta\DBbeta\Program.cs:line 76 could not define this table"
4

1 回答 1

0

首先检查表是否存在。如果不存在，则创建表。

这是正在运行的示例，输入您的值并运行它

并使用INTEGER 而不是 int See this for Datatypes

var commandStr= "CREATE TABLE Customer(First_Name char(50),Last_Name char(50),Address char(50),City char(50),Country char(25),Birth_Date datetime)";

using (SqlCommand command = new SqlCommand(commandStr, con))
command.ExecuteNonQuery();

查找参考

于 2018-06-25T18:13:13.230 回答