初始化字符串的格式不符合从索引 124 开始的规范

Question

尝试使用 Visual Studio 2017 访问 SQL Server 2014 数据库;每次运行时，都会显示此错误

System.ArgumentException：初始化字符串的格式不符合从索引 124 开始的规范

阅读一些已经关于堆栈溢出的问题，但它们属于其他上下文。如 asp.net 或 Azure 数据库等

<configuration>
    <connectionStrings>
        <add name="EMPLOYES" 
             connectionString="Data Source=DESKTOP-0ROOGH3SQLEXPRESS;Initial Catalog=EMPLOYES;Integrated Security = true;System.Dat.SqlClient"/>
    </connectionStrings>
</configuration>

法典：

private void button2_Click(object sender, EventArgs e)
{
    String conString = ConfigurationManager.ConnectionStrings["EMPLOYES"].ConnectionString;
    // here I get the exception
    SqlConnection conn = new SqlConnection(conString); 
    SqlCommand cmd = new SqlCommand("AddNewEmployee", conn);
    cmd.CommandType = CommandType.StoredProcedure;
    cmd.Parameters.Add("@EmployeeID", SqlDbType.NVarChar, 8).Value = EmpIDTextBox.Text;
    cmd.Parameters.Add("@FirstName", SqlDbType.NVarChar, 50).Value = FirstNameTextBox.Text;
    cmd.Parameters.Add("@LastNmae", SqlDbType.NVarChar, 50).Value = LastNameTextBox.Text;
    cmd.Parameters.Add("@Email", SqlDbType.NVarChar, 50).Value = EmailTextBox.Text;
    cmd.Parameters.Add("@Telephone", SqlDbType.NVarChar, 50).Value = TelephoneTextBox.Text;
    conn.Open();
    cmd.ExecuteNonQuery();
    conn.Close();
    MessageBox.Show("Employee is added successfully!");
}

我希望插入记录，但它会产生一些异常

Answer 1

连接字符串看起来完全乱码，请尝试类似

<configuration>
    <connectionStrings>
       <add name="EMPLOYES" 
            connectionString="Data Source=DESKTOP-0ROOGH3SQLEXPRESS;Initial Catalog=EMPLOYES;Integrated Security = true;" 
            providerName="System.Data.SqlClient" />
    </connectionStrings>
</connectionStrings>

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其他资源

• 连接字符串和配置文件

• SQL 客户端连接字符串