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[英]How can I pass a function to a C# class dll, that I am calling from another C# app? The function is defined in the app where the dll is called
[英]how can function called from another class in C#
我想为我所有的按钮单击方法都创建一个通用类。 我的按钮单击方法可以在相同的aspx.cs文件中正常工作,但是当我想从通用类调用此方法时。 但是参数没有通过。 有人可以帮帮我吗。 这是我的代码。
这是基类
namespace WebApplication1
{
public partial class Singnup : System.Web.UI.Page
{
protected void SUpButton_Click(object sender, EventArgs e)
{
Webapplication2.program.Insert_RData(sender, e);
}
}
}
这是第二类,我想从那里调用按钮方法
namespace Webapplication2
{
public class program : WebApplication1.Singnup
{
public static void Insert_RData(object sender, EventArgs e)
{
SqlConnection con_Signup = new SqlConnection(ConfigurationManager.ConnectionStrings["myconnectionstring"].ConnectionString);
con_Signup.Open();
SqlCommand cmd_check = new SqlCommand("Check_Existing_Email", con_Signup);
cmd_check.CommandType = CommandType.StoredProcedure;
cmd_check.Parameters.AddWithValue("@mail",EmailId);
object i = cmd_check.ExecuteScalar();
if (i != null)
{
lbforerror.Text = "This Email is already Registered";
lbforerror.Visible = true;
}
尝试下面的代码
namespace WebApplication1
{
public partial class Singnup : System.Web.UI.Page
{
protected void SUpButton_Click(object sender, EventArgs e)
{
string EmailId = "yourmailid@domain.com";
Webapplication2.program.InsertRData(EmailId);
}
}
}
namespace Webapplication2
{
public class program : WebApplication1.Singnup
{
public static void Insert_RData(object sender, EventArgs e)
{
string EmailId = "yourmailid@domain.com";
InsertRData(EmailId);
}
public static void InsertRData(string EmailId)
{
SqlConnection con_Signup = new SqlConnection(ConfigurationManager.ConnectionStrings["myconnectionstring"].ConnectionString);
con_Signup.Open();
SqlCommand cmd_check = new SqlCommand("Check_Existing_Email", con_Signup);
cmd_check.CommandType = CommandType.StoredProcedure;
cmd_check.Parameters.AddWithValue("@mail", EmailId);
object i = cmd_check.ExecuteScalar();
if (i != null)
{
lbforerror.Text = "This Email is already Registered";
lbforerror.Visible = true;
}
}
}
}
您正在将信息从实例化的Singup
类Singup
到静态类program
。 标签等将无法从静态类获得,因为它与实际标签没有任何关系。
如果您想分开按钮单击动作,并且希望它们访问表单元素(例如lbforerror
那么我建议您使用部分类或仅在同一类内使用Region来清理逻辑)
#region Button Logic
//Your logic here
#endregion //button logic
最好的方法是将可重用逻辑分为一个完全不同的类(在这种情况下,处理插入),该类返回结果,并由您的原始类决定:
public class ConnectionManager
{
public object InsertRData(string EmailId)
{
SqlConnection con_Signup = new SqlConnection(ConfigurationManager.ConnectionStrings["myconnectionstring"].ConnectionString);
con_Signup.Open();
SqlCommand cmd_check = new SqlCommand("Check_Existing_Email", con_Signup);
cmd_check.CommandType = CommandType.StoredProcedure;
cmd_check.Parameters.AddWithValue("@mail", EmailId);
object i = cmd_check.ExecuteScalar();
return i;
}
}
那你原来的课可以简单地说
public partial class Singnup : System.Web.UI.Page
{
protected void SUpButton_Click(object sender, EventArgs e)
{
ConnectionManager mgr = new ConnectionManager();
object i = mgr.Insert_RData("email logic here");
if (i != null)
{
lbforerror.Text = "This Email is already Registered";
lbforerror.Visible = true;
}
}
}
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