Question

我在C＃中有一个double longitude =1.041970849797e-05的数字当我尝试将其插入decimal(9,6)列时，收到错误消息：

将数据类型nvarchar转换为数字
时出错

如何将上述内容正确保存为小数？

C＃应用程序代码：

static void Main(string[] args)
{
    double lat=1.041970849797e-05;
    insertRecs(lat);
}

private static void insertRecs(double latitude)
{
    Int32 rowsAffected = 0;
    string connectionString = GetConnectionString();
    using (SqlConnection connection = new SqlConnection(connectionString))
    {
        connection.Open();
        SqlCommand cmd = new SqlCommand("dbo.usp_temp", connection);
        cmd.CommandType = CommandType.StoredProcedure;
        cmd.CommandTimeout = 90;
        try
        {
            rowsAffected = cmd.ExecuteNonQuery();
        }
        catch (Exception ep)
        {
            Console.WriteLine("Exception in Insertrecords ");
            Console.WriteLine(ep.Message);
        }
    }
}

SQL存储过程：

create PROCEDURE [dbo].[usp_temp]
    --The parameters for the stored procedure
    @latitude decimal(9,6)
AS
BEGIN
    insert into temptest(latitude) values(@latitude);
END

Answer 1

查看您提供给我们的代码示例，在运行存储过程时，实际上并未映射latitude变量。

你需要添加几行代码：

SqlParameter param = cmd.Parameters.Add("@latitude", SqlDbType.Decimal);
param.Direction = ParameterDirection.Input;
param.Value = latitude;

并编辑到您的代码中：

using (SqlConnection connection = new SqlConnection(connectionString))
{
    connection.Open();
    SqlCommand cmd = new SqlCommand("dbo.usp_temp", connection);
    cmd.CommandType = CommandType.StoredProcedure;
    cmd.CommandTimeout = 90;

    // Map the parameters into the Stored Procedure
    SqlParameter param = cmd.Parameters.Add("@latitude", SqlDbType.Decimal);
    param.Direction = ParameterDirection.Input;
    param.Value = latitude;

    try
    {
        rowsAffected = cmd.ExecuteNonQuery();
    }
    catch (Exception ep)
    {
        Console.WriteLine("Exception in Insertrecords ");
        Console.WriteLine(ep.Message);
    }
}

将E表示法双精度插入十进制列

1 个答案: