Question

我正在创建一个简单的程序，现在的想法是通过我的c＃程序在数据库中插入数据“人员信息名称，年龄ETC”，当我点击按钮时我得到此错误

System.Data.OleDb.OleDbException（0x80040E07）：条件表达式中的数据类型不匹配。在System.Data.OleDb.OleDbCommand.ExecuteCommandTextErrorHandling（OleDbHResult hr）在System.Data.OleDb.OleDbCommand.ExecuteCommandTextForSingleResult（tagDBPARAMS dbParams，Object＆amp; executeResult）在System.Data.OleDb.OleDbCommand.ExecuteCommandText（Object＆amp; executeResult）在System.Data.OleDb.OleDbCommand.ExecuteCommand（CommandBehavior behavior，Object＆amp; executeResult）在System.Data.OleDb.OleDbCommand.ExecuteReaderInternal（CommandBehavior behavior，String method）在System.Data.OleDb.OleDbCommand.ExecuteNonQuery（）在C：\ Users \ OmarS_000 \ documents \ visual studio 2015 \ Projects \ School System \ School System \ newRegisteration.cs：第35行的School_System.newRegisteration.button1_Click（Object sender，EventArgs e）

这是我的代码

   using System;
   using System.Collections.Generic;
   using System.ComponentModel;
   using System.Data;
   using System.Drawing;
   using System.Linq;
   using System.Text;
   using System.Threading.Tasks;
   using System.Windows.Forms;
   using System.Data.OleDb;
   using System.ComponentModel;


  public partial class newRegisteration : Form

               {
            private OleDbConnection connection = new OleDbConnection();
            public newRegisteration()
            {
                InitializeComponent();
                connection.ConnectionString = @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Users\OmarS_000\Documents\Visual Studio 2015\Projects\School System\School System\School.accdb;
    Persist Security Info=False;";
            }

            private void button1_Click(object sender, EventArgs e)
            {
                try
                {
                    connection.Open();
                    OleDbCommand command = new OleDbCommand();
                    command.Connection = connection;
                    command.CommandText = "INSERT into School ([Name], [Age], [Grade], [Class]) VALUES('" + nameTextBox2 + "', '" + ageTextBox2 + "', '" + gradeTextBox2 + "', '" + classTextBox2 + "') ";

                    command.ExecuteNonQuery();
                    MessageBox.Show("Data Saved");
                    connection.Close();
                }
                catch (Exception ex)
                {
                    MessageBox.Show("Error" + ex);
                }
            }
              }

第35行，错误提到它包含

command.ExecuteNonQuery();

当我点击按钮时出现此错误，但Visual Studio中的代码完美调试0错误。那么我想念的是什么地方？

Answer 1

您正在使用某些文本框中的值，因此您需要使用其Text属性来获取值

command.CommandText = "INSERT into School ([Name], [Age], [Grade], [Class]) VALUES('" + nameTextBox2.Text + "', '" + ageTextBox2.Text + "', '" + gradeTextBox2.Text + "', '" + classTextBox2.Text + "') ";

ms acess数据库中条件表达式异常中的数据类型不匹配

1 个答案: