Question

我为一个大学项目创建了一个ASP.NET Web应用程序，我使用本地mysql db完成所有功能。由于我无法控制的原因，我被指示将数据库更改为访问数据库。所以我做了这个，改掉了“sql＆＃39; Oledb＆＃39;的陈述我的应用程序的一半和一半与新的更改工作正常，但我有另一半的问题。我将从我的web.config页面添加我的连接字符串，然后是我遇到的问题。有人能看出我出错的地方吗？

  <add name="newregDBConnectionString"  connectionString="Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Users\Alex\Documents\Database1.accdb"
  providerName="System.Data.OleDb" />

我有两个问题，第一个是我有一个注册页面，你填写一个表格，细节存储在数据库中。当我单击“提交”将详细信息发送到数据库时，出现错误;

第二个问题是我有一个使用数据源的gridview显示注册的人，但是当我点击视图按钮时，我收到以下错误;

我添加了

＆＃34;扔新的例外（ConfigurationManager.ConnectionStrings [＆＃34; newregDBConnectionString＆＃34]。ConnectionString中）;＆＃34; 到我的global.aspx页面查看错误，它显示以下内容;

它使我的web.config页面中的连接字符串看起来不正确，但我的应用程序的另一半正在使用数据库连接（我的登录页面），所以我无法看到问题。对于长篇帖子道歉，我非常感谢有人指出我愚蠢的地方！提前谢谢。

更新：

protected void submitBtn_Click(object sender, EventArgs e)
    {
        OleDbConnection connect = new OleDbConnection(ConfigurationManager.ConnectionStrings["newregDBConnectionString"].ConnectionString);
        {                                           
            if (parentRadBtn.Checked)
            {
                if (firstNameBox.Text == "" || surnameBox.Text == "" || postcodeBox.Text == "" || teleBox.Text == "" || emailBox.Text == "" || userBox.Text == "" || passwordBox.Text == "")
                {
                    Response.Write("<script>alert('Please ensure all fields have an entry');</script>");
                    successLabel.Text = ("");
                    userBox.Text = "";
                    firstNameBox.Text = "";
                    surnameBox.Text = "";
                    postcodeBox.Text = "";
                    teleBox.Text = "";
                    emailBox.Text = "";
                    passwordBox.Text = "";
                }                 
                else
                {
                    OleDbCommand pa = new OleDbCommand("INSERT INTO parent(parentID, firstname, surname, postcode, telephone, email, password) VALUES (@parentID, @firstname, @surname, @postcode, @telephone, @email, @password)", connect);
                    pa.Parameters.AddWithValue("@parentID", userBox.Text);
                    pa.Parameters.AddWithValue("@firstname", firstNameBox.Text);
                    pa.Parameters.AddWithValue("@surname", surnameBox.Text);
                    pa.Parameters.AddWithValue("@postcode", postcodeBox.Text);
                    pa.Parameters.AddWithValue("@telephone", teleBox.Text);
                    pa.Parameters.AddWithValue("@email", emailBox.Text);
                    pa.Parameters.AddWithValue("@password", passwordBox.Text);

                    connect.Open();
                    pa.ExecuteNonQuery();
                    connect.Close();
                }

                if (IsPostBack)
                {
                    userBox.Text = "";
                    firstNameBox.Text = "";
                    surnameBox.Text = "";
                    postcodeBox.Text = "";
                    teleBox.Text = "";
                    emailBox.Text = "";
                    passwordBox.Text = "";
                }

            }           
            else if (childRadBtn.Checked)
            {
                if (firstNameBox.Text == "" || dayDobList.Text == "" || monthDobList.Text == "" || yearDobList.Text == "" || genderList.Text == "" || userBox.Text == "" || passwordBox.Text == "")
                {
                    Response.Write("<script>alert('Please ensure all fields have an entry');</script>");
                    successLabel.Text = ("");
                    userBox.Text = "";
                    firstNameBox.Text = "";
                    dayDobList.Text = "";
                    monthDobList.Text = "";
                    yearDobList.Text = "";
                    genderList.Text = "";
                    passwordBox.Text = "";
                }                 
                else
                {
                    OleDbParameter dob = new OleDbParameter("@dob", System.Data.SqlDbType.DateTime);
                    dob.Value = new DateTime(Int32.Parse(yearDobList.Text), Int32.Parse(monthDobList.Text), Int32.Parse(dayDobList.Text));                      

                    OleDbCommand ca = new OleDbCommand("INSERT INTO children(childID, firstname, dob, gender, password) VALUES (@childID, @firstname, @dob, @gender, @password)", connect);
                    ca.Parameters.AddWithValue("@childID", userBox.Text);
                    ca.Parameters.AddWithValue("@firstname", firstNameBox.Text);
                    ca.Parameters.Add(dob);
                    ca.Parameters.AddWithValue("@gender", genderList.Text);
                    ca.Parameters.AddWithValue("@password", passwordBox.Text);

                    connect.Open();
                    ca.ExecuteNonQuery();
                    connect.Close();
                }
                if (IsPostBack)
                {
                    userBox.Text = "";
                    firstNameBox.Text = "";
                    dayDobList.Text = "";
                    monthDobList.Text = "";
                    yearDobList.Text = "";
                    genderList.Text = "";
                    passwordBox.Text = "";
                }              
            }
        }
    }

Answer 1

看看这个：

OleDbConnection connect = new OleDbConnection("newregDBConnectionString");

请注意，newregDBConnectionString在引号中？它看起来像是保存连接字符串的变量的名称。通过将其放在引号中，您将文本“newregDBConnectionString”作为连接字符串本身传递，而不是该变量中的任何字符串。

您需要从配置管理器获取此连接字符串值，就像在第二张和第三张图像中一样。

此外，在第二张图片中，您有：

SqlDataSource source = new SqlDataSource();

这需要更改为OleDbDataSource。

Answer 2

您的登录页面有此

  OleDbConnection connect = new OleDbConnection(ConfigurationManager.ConnectionStrings["newregDBConnectionString"].ConnectionString);

在您的注册表单页面上，我认为您只是传递一个字符串

使其与登录页面相同

ASP.NET Web应用程序 - 自从切换mysql到访问db

2 个答案: