问题描述

我有一个简单的插入语句到 MonoDroid 上的 SQLite 数据库中的表.

I have a simple insert statement to a table in an SQLite database on MonoDroid.

当插入数据库时​​，它说

When inserting to the database, it says

SQLite 错误为 Mono.Data.Sqlite.SqliteStatement.BindParameter 处的命令提供的参数不足

SQLite error Insufficient parameters supplied to the command at Mono.Data.Sqlite.SqliteStatement.BindParameter

我认为要么存在错误，要么错误消息具有误导性.因为我只有 5 个参数并且我提供了 5 个参数，所以我看不出这是怎么回事.

I think there is either a bug, or the error message is misleading. Because I only have 5 parameters and I am providing 5 parameters, so I cannot see how this be right.

我的代码如下，任何帮助将不胜感激.

My code is below, and any help would be greatly appreciated.

try
{
    using (var connection = new SqliteConnection(ConnectionString))
    {
        connection.Open();
        using (var command = connection.CreateCommand())
        {
            command.CommandTimeout = 0;
            command.CommandText = "INSERT INTO [User] (UserPK ,Name ,Password ,Category ,ContactFK) VALUES ( @UserPK , @Name , @Password , @Category , @ContactFK)";
            command.Parameters.Add(new SqliteParameter("@Name", "Has"));
            command.Parameters.Add(new SqliteParameter("@Password", "Has"));
            command.Parameters.Add(new SqliteParameter("@Cateogry", ""));
            command.Parameters.Add(new SqliteParameter("@ContactFK", DBNull.Value));
            command.Parameters.Add(new SqliteParameter("@UserPK", DbType.Guid) {Value = Guid.NewGuid()});
            var result = command.ExecuteNonQuery();
            return = result > 0 ;
        }
    }
}
catch (Exception exception)
{
    LogError(exception);
}

推荐答案

您在 INSERT 语句中对 @Category 的拼写与添加的参数不同.你有:

Your spelling for @Category in INSERT statement is different from added parameter. You have:

command.Parameters.Add(new SqliteParameter("@Cateogry", ""));
                                           ^^^^^^^^^^^
                                           //@Category

它应该在哪里:

将您的陈述修改为:

command.Parameters.Add(new SqliteParameter("@Category", ""));

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