Question

我已阅读所有与此有关的帖子，但无法弄明白。我正在尝试从表单插入数据库但是当我点击提交按钮并将BookingName传递给后面的代码时，我得到“关键字不支持：'元数据'”。我想我的问题出在web.config中。真的很感激任何帮助。仍然掌握着.NET

这是错误：

描述：在执行当前Web请求期间发生了未处理的异常。请查看堆栈跟踪，以获取有关错误及其在代码中的起源位置的更多信息。

异常详细信息： System.ArgumentException：不支持关键字：'元数据'。

来源错误：

Line 20:     {
Line 21:         string connString = System.Configuration.ConfigurationManager.ConnectionStrings["CateringAuthorizationEntities"].ConnectionString;
Line 22:         SqlConnection conn = new SqlConnection(connString);
Line 23:         string sql = "INSERT INTO tbBooking (BookingName) VALUES "
Line 24:                     + " (@BookingName)";

C＃代码：

private void ExecuteInsert(string name)
{
    string connString = System.Configuration.ConfigurationManager.ConnectionStrings["CateringAuthorizationEntities"].ConnectionString;
    SqlConnection conn = new SqlConnection(connString);
    string sql = "INSERT INTO tbBooking (BookingName) VALUES "
                + " (@BookingName)";

    try
    {
        conn.Open();
        SqlCommand cmd = new SqlCommand(sql, conn);
        SqlParameter[] param = new SqlParameter[1];
        //param[0] = new SqlParameter("@id", SqlDbType.Int, 20);
        param[0] = new SqlParameter("@BookingName", System.Data.SqlDbType.VarChar, 50);

        param[0].Value = name;

        for (int i = 0; i < param.Length; i++)
        {
            cmd.Parameters.Add(param[i]);
        }

        cmd.CommandType = System.Data.CommandType.Text;
        cmd.ExecuteNonQuery();
    }
    catch (System.Data.SqlClient.SqlException ex)
    {
        string msg = "Insert Error:";
        msg += ex.Message;
        throw new Exception(msg);
    }
    finally
    {
        conn.Close();
    }
}

protected void BtnCatering_Click(object sender, EventArgs e)
{
    if (Page.IsValid)
    {

        //call the method to execute insert to the database
        ExecuteInsert(BookingName.Text);
        Response.Write("Record was successfully added!");
    }
}

Web.Config中：

<connectionStrings>
<add name="ApplicationServices" connectionString="data source=.\SQLEXPRESS;Integrated Security=SSPI;AttachDBFilename=|DataDirectory|\aspnetdb.mdf;User Instance=true" providerName="System.Data.SqlClient"/>
<add name="CateringAuthorizationEntities" connectionString="metadata=res://*/App_Code.CateringAuthorization.csdl|res://*/App_Code.CateringAuthorization.ssdl|res://*/App_Code.CateringAuthorization.msl;provider=System.Data.SqlClient;provider connection string=&quot;data source=xxxxxx;initial catalog=CateringAuthorization;integrated security=True;multipleactiveresultsets=True;App=EntityFramework&quot;" providerName="System.Data.EntityClient"/>

Answer 1

查看web.config中的连接字符串，它包含单词metadata。您的连接字符串应该用作实体框架。查看使用Entity Framework执行命令。

您可以创建EntityConnection

Answer 2

您正在使用ADO.NET连接（SqlConnection），它不采用为Entity Framework指定的格式。

尝试 “data source = MY-PC \ SQL2008; initial catalog = CateringAuthorization; integrated security = True”

尝试在db中插入但不断支持关键字：'metadata'

2 个答案: