c# - 如何同时使用 jquery、ajax 和 mysql？

Question

我有一些代码。我想添加 jquery 和 ajaxin 我的代码。我尝试过，但没有这样做。

这是我的 jQuery 代码

$(document).ready(function () {
    $('#btnGOlustur_Click').click(function () {
        var Pro_id = $('#drop_p').val(); //drop_p is combobox' name.
        var Ity_id = $('#drop_i').val();
        var Sta_id = $('#drop_s').val();
        document.write("basliyorrrr");

        $.ajax({
            type: 'POST',
            contentType: "application/json; charset=utf-8",
            url: 'GorevEkle.aspx/btnGOlustur_Click',
            data: "{'project_id':'" + Pro_id + "','status_id':'" + Sta_id + "','itype_id':'" + Ity_id + "'}",
            async: false,
            success: function (response) {
                $('#drop_p').val(''); $('#drop_i').val(''); $('#drop_s').val('');
                alert("Record saved successfully in database");
                document.write("dataabase e kaydedildi");
            },
            error: function () {
                alert("some problem in saving data");
            }
        });
    });
});

我保存的cs文件

[WebMethod]
[ScriptMethod]
protected void btnGOlustur_Click(object sender, EventArgs e)
{
    try
    {
        MySqlConnection con = new MySqlConnection(Globals.CONNECTION_STRING);
        con.Open();
        String UserId = Session["user_id"].ToString();
        int Pro_id = Convert.ToInt32(drop_p.SelectedValue);
        int Sta_id = Convert.ToInt32(drop_s.SelectedValue);
        int Ity_id = Convert.ToInt32(drop_i.SelectedValue);
        MySqlCommand cmd = new MySqlCommand("INSERT INTO issue (user_id, project_id, status_id, itype_id) values ('" + UserId + "','" + Pro_id + "','" + Sta_id + "','" + Ity_id + "')", con);
        cmd.ExecuteNonQuery();
        con.Close();
    }
    catch (Exception err)
    {
        lbl_hata.Text = "Error reading list of names. ";
        lbl_hata.Text += err.Message;
    }
    Response.Redirect("Profil.aspx");
}

这是我的错误:

A first chance exception of type 'System.Threading.ThreadAbortException' occurred in mscorlib.dll
An exception of type 'System.Threading.ThreadAbortException' occurred in mscorlib.dll but was not handled in user code

Answer 1

您的代码中有几个错误

1. [WebMethod] 应该是静态的才能调用它。
2. 将 btnGOlustur_Click 逻辑移至单独的静态方法
3. 您无法在 ajax 上下文中进行 Response.Redirect
4. 从 Request.Params 中获取值

考虑到以上所有

[WebMethod]
[ScriptMethod]
public static string MyMethod()
{
    try
    {
        MySqlConnection con = new MySqlConnection(Globals.CONNECTION_STRING);
        con.Open();
        String UserId = HttpContext.Current.Session["user_id"].ToString();
        int Pro_id = HttpContext.Current.Request.Params["project_id"];
        //other values
        MySqlCommand cmd = new MySqlCommand("INSERT INTO issue (user_id, project_id, status_id, itype_id) values ('" + UserId + "','" + Pro_id + "','" + Sta_id + "','" + Ity_id + "')", con);
        cmd.ExecuteNonQuery();
        con.Close();
    }
    catch (Exception err)
    {
        return "error";
    }
    return "success";
}

然后是你的 jQuery

$(document).ready(function () {
    $('#btnGOlustur_Click').click(function (e) {
        var Pro_id = $('#drop_p').val(); //drop_p is combobox' name.
        var Ity_id = $('#drop_i').val();
        var Sta_id = $('#drop_s').val();


        $.ajax({
            type: 'POST',
            contentType: "application/json; charset=utf-8",
            url: 'GorevEkle.aspx/MyMethod',
            data: "{'project_id':'" + Pro_id + "','status_id':'" + Sta_id + "','itype_id':'" + Ity_id + "'}",
            async: false,
            success: function (response) {
                if(response=="success"){
                $('#drop_p').val(''); $('#drop_i').val(''); $('#drop_s').val('');
                alert("Record saved successfully in database");
                }
                else{
                 //handle error
                }
            },
            error: function () {
                alert("some problem in saving data");
            }
        });
    });
});