Question

我使用SQL Server Express 2014在Web应用程序上工作。在那里，我习惯于将一些数据设置到表中。没有错误发生，但是数据没有设置到表中。

    <?xml version="1.0" encoding="utf-8"?>
<!--
  For more information on how to configure your ASP.NET application, please visit
  http://go.microsoft.com/fwlink/?LinkId=169433
  -->
<configuration>
  <system.web>
    <compilation debug="true" targetFramework="4.6"/>
    <httpRuntime targetFramework="4.6"/>
    <httpModules>
      <add name="ApplicationInsightsWebTracking" type="Microsoft.ApplicationInsights.Web.ApplicationInsightsHttpModule, Microsoft.AI.Web"/>
    </httpModules>
  </system.web>
  <connectionStrings>
    <add name="connect" connectionString="Data Source=LAKSHITHA\SQLEXPRESS;Initial Catalog=EMS1;Integrated Security =True" providerName="System.Data.SqlClient"/>
  </connectionStrings>
  <system.codedom>
    <compilers>
      <compiler language="c#;cs;csharp" extension=".cs"
        type="Microsoft.CodeDom.Providers.DotNetCompilerPlatform.CSharpCodeProvider, Microsoft.CodeDom.Providers.DotNetCompilerPlatform, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"
        warningLevel="4" compilerOptions="/langversion:6 /nowarn:1659;1699;1701"/>
      <compiler language="vb;vbs;visualbasic;vbscript" extension=".vb"
        type="Microsoft.CodeDom.Providers.DotNetCompilerPlatform.VBCodeProvider, Microsoft.CodeDom.Providers.DotNetCompilerPlatform, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"
        warningLevel="4" compilerOptions="/langversion:14 /nowarn:41008 /define:_MYTYPE=\&quot;Web\&quot; /optionInfer+"/>
    </compilers>
  </system.codedom>
  <system.webServer>
    <validation validateIntegratedModeConfiguration="false"/>
    <modules>
      <remove name="ApplicationInsightsWebTracking"/>
      <add name="ApplicationInsightsWebTracking" type="Microsoft.ApplicationInsights.Web.ApplicationInsightsHttpModule, Microsoft.AI.Web"
        preCondition="managedHandler"/>
    </modules>
  </system.webServer>
</configuration>

这是我的aspx.cs文件

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

namespace WebApplication2
{
    public partial class Reg2 : System.Web.UI.Page
    {
        SqlConnection con = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["connect"].ToString());


        protected void Page_Load(object sender, EventArgs e)
        {

            // con.ConnectionString = "Data Source=LAKSHITHA/SQLEXPRESS ;Initial Catalog=EMS1;Integrated Security=true";
            con.Open();
        }

        protected void Button2_Click(object sender, EventArgs e)
        {
            SqlCommand cmd = new SqlCommand("insert into Epersonal " + " (Emp_Id,NIC,Gender,B_day,Nationality,Marital_status,Work_Role)values(@Emp_Id,@NIC,@Gender,@B_day,@Nationality,@Marital_status,@Work_Role)", con);
            cmd.Parameters.AddWithValue("@Emp_Id", TextBox1.Text);
            cmd.Parameters.AddWithValue("@NIC", nic.Text);
            cmd.Parameters.AddWithValue("@Gender", DropDownList2.SelectedItem.Value);
            cmd.Parameters.AddWithValue("@B_day", bday.Text);
            cmd.Parameters.AddWithValue("@Nationality", ntionl.Text);
            cmd.Parameters.AddWithValue("@Marital_status", DropDownList3.SelectedItem.Value);
            cmd.Parameters.AddWithValue(" @Work_Role", DropDownList1.SelectedItem.Value);
            Response.Write("cannection made");
            Response.Redirect("log.aspx");
            // con.Open();
            con.Close();
            //cmd.ExecuteNonQuery();
        }
    }
}

[这是我的表格和tz属性] 设置数据后，数据库中没有数据。在我的日志记录表中，我已连接数据库，并在其中使用数据库数据并将日志记录到应用程序你能在这里告诉我出什么问题了吗？？

Answer 1

您没有执行命令。另外，将SqlCommand广告SqlConnection包装在using子句中。

using (SqlConnection con = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["connect"].ToString()) 
{
   using (SqlCommand cmd = new SqlCommand("insert into Epersonal (Emp_Id,NIC,Gender,B_day,Nationality,Marital_status,Work_Role)values(@Emp_Id,@NIC,@Gender,@B_day,@Nationality,@Marital_status,@Work_Role)", con))
   {
          cmd.Parameters.AddWithValue("@Emp_Id", TextBox1.Text);
          cmd.Parameters.AddWithValue("@NIC", nic.Text);
          cmd.Parameters.AddWithValue("@Gender", DropDownList2.SelectedItem.Value);
          cmd.Parameters.AddWithValue("@B_day", bday.Text);
          cmd.Parameters.AddWithValue("@Nationality", ntionl.Text);
          cmd.Parameters.AddWithValue("@Marital_status", DropDownList3.SelectedItem.Value);
          cmd.Parameters.AddWithValue(" @Work_Role", DropDownList1.SelectedItem.Value);
          con.Open();
          Response.Write("cannection made");
          cmd.ExecuteNonQuery();
  }
}
Response.Redirect("log.aspx");

编辑：

最好使用Add而不是AddWithValue，以避免在推断正确的数据库类型时出错。例如：

cmd.Parameters.Add("@Nationality", SqlDbType.Varchar, 20).Value = ntion1.Text; //Picked a random size of 20, use your specified size instead

将其与所有值一起使用。

c＃.net Web应用程序..数据未保存在数据库中

1 个答案: