c# - 系统.Data.SqlClient.SqlException : Incorrect syntax near the keyword 'file'

Question

我是 AsP.net 的新手，当我尝试用我常用的代码连接到数据库时，一直显示异常，我不知道出了什么问题
异常(exception)是:

" System.Data.SqlClient.SqlException: Incorrect syntax near the keyword 'file'."

这是我的代码:

string ID = Request.QueryString["id"];

SqlCommand cmd = new SqlCommand("select title,file path,Upload Date from [Media] where ID=@id", conn);
cmd.CommandType = CommandType.Text;
SqlDataReader rdr=null;

try
{
    conn.Open();
    rdr = cmd.ExecuteReader();
    try
    {
        conn.Open();
        rdr = cmd.ExecuteReader();

        // print the CustomerID of each record
        while (rdr.Read())
        {
            pathTextBox.Text = rdr["file Path"].ToString();
            DateTextBox.Text = rdr["Upload Date"].ToString();
            titleTextBox.Text = rdr["title"].ToString();
        }

        Image1.ImageUrl = pathTextBox.Text;
    }

Answer 1

如果列名中有空格，则需要使用括号，如下所示

从 ID=@id 的 [Media] 中选择标题、[文件路径]、[上传日期]

using (var conn = new SqlConnection(SomeConnectionString))
using (var cmd = conn.CreateCommand())
{
    conn.Open();
    cmd.CommandText = "select title,[file path],[Upload Date] from [Media] where ID=@id";
    cmd.Parameters.AddWithValue("@id", idval); // set the id parameter
    using (var reader = cmd.ExecuteReader())
    {
        if (reader.Read()) // you don't need while loop
        {
            pathTextBox.Text = reader.GetString(reader.GetOrdinal("[file path]"))
        }
    }
}