將數據從文本框插入數據庫時​​出錯

Question

我有文本和按鈕，並且在提交時，我正在檢查數據庫是否有任何行，如果沒有，則插入行，否則將對其進行更新，但是在提交時拋出錯誤，在else中的“ cmd.ExecuteNonQuery”上說不正確的語法條件

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.SqlClient;


public partial class CM : System.Web.UI.Page
{
    DataSet ds = new DataSet();
    SqlDataAdapter da;
    SqlCommand cmd;
    DataTable dt;
    SqlConnection con = new SqlConnection("server =consulting76\\SQLEXPRESS; database = msdb; Integrated Security=True; MultipleActiveResultSets=True");

    protected void Page_Load(object sender, EventArgs e)
    {
        da = new SqlDataAdapter("Select * from NOTESMAKER", con);
        da.Fill(ds);
        //dt = ds.Tables["NOTESMAKER"];
    }

    protected void Button1_Click(object sender, EventArgs e)
    {   
        con.Open();
        if (ds.Tables[0].Rows.Count == 0)
        {
            cmd = new SqlCommand("Insert into NOTESMAKER(NOTESMAKER) Values(@text1)",con);
            cmd.Parameters.Add(new SqlParameter("@text1", SqlDbType.NText)).Value = TextBox1.Text;
            da.InsertCommand = cmd;
            cmd.ExecuteNonQuery();
        }
        else
        {
            cmd = new SqlCommand("Update NOTESMAKER set NOTESMAKER = @text1)",con);
            cmd.Parameters.Add(new SqlParameter("@text1", SqlDbType.NText)).Value = TextBox1.Text;
            da.UpdateCommand = cmd;
            cmd.ExecuteNonQuery();
        }
        con.Close();
    }

}

Answer 1

您正在關閉此行中從未打開的括號：

cmd = new SqlCommand("Update NOTESMAKER set NOTESMAKER = @text1)",con);

另外，不需要設置數據適配器的InsertCommand和UpdateCommand屬性。