c# - 在 Asp.net C# 中使用文件上传将数据从 .csv 导入 SQL Server

Question

我有一个 .csv 文件，我通过 FileUpload 控件上传它，我想将该 csv 文件中的全部数据传输到 SQL Server 数据库表中，但我的数据库中存在一些问题代码:

 DataTable tblReadCSV = new DataTable();
    tblReadCSV.Columns.Add("EmailId");
    string path = System.IO.Path.GetFileName(fupEmails.PostedFile.FileName);
    fupEmails.PostedFile.SaveAs(Server.MapPath("~/Contacts/" + path));
    path = Server.MapPath("~/Contacts/" + path);
    TextFieldParser csvParser = new TextFieldParser(path);
    csvParser.Delimiters = new string[] { "," };
    csvParser.TrimWhiteSpace = true;
    //csvParser.ReadLine();
    while (!csvParser.EndOfData)
    {
        string[] fields = csvParser.ReadFields();
        tblReadCSV.Rows.Add(fields.Equals("Email"));
    }
    string connection = @"Data Source=ANURAG-PC; Initial Catalog=MailServer; Persist Security Info=True; User ID=sa; Password=anurag";
    string strSql = "Insert into EmailData(EmailId) Values(@Email)";
    SqlConnection con=new SqlConnection(connection);
    SqlCommand cmd=new SqlCommand();
    cmd.CommandType=CommandType.Text;
    cmd.CommandText=strSql;
    cmd.Connection=con;
    cmd.Parameters.Add("@Email",SqlDbType.NVarChar,250,"Email");
    SqlDataAdapter daAdapter=new SqlDataAdapter();
    daAdapter.InsertCommand=cmd;
    int result=daAdapter.Update(tblReadCSV);
    lblError.Text="Send Successfully";

我在倒数第二行遇到错误

int result = daAdapter.Update(tblReadCSV);

错误是

The parameterized query '(@Email nvarchar(250))Insert into EmailData(EmailId) Values(@Ema' expects the parameter '@Email', which was not supplied.

Answer 1

cmd.Parameters.Add("@Email",SqlDbType.NVarChar,250,"EmailId");

您添加到 DataTable 的列的名称是 EmailId，而不是 Email。