我正在 ASP.net 和 SQL Server 中做一个项目。我在用户登录屏幕上调用存储过程来验证用户。但是当我调用存储过程时，需要刷新整个页面才能获取数据。
如何在不刷新页面的情况下实现同样的效果？
这是我当前的代码
sql = "EXEC dbo.sProc_Admin_Auth @UserNm = '" + User + "',@Pwd = '"+Pwd+"'";
cmd = new SqlCommand(sql, cn.connect());
dr = cmd.ExecuteReader();
if(dr.Read())
{
Session["UserId"] = dr["UserId"].ToString();
Session["LoginId"] = User;
Session["UserNm"] = dr["FullNm"].ToString();// "Jayasurya Satheesh";
Session["Email"] = dr["Email"].ToString();
Session["JoinDt"] = dr["CreateDt"].ToString();
Response.Redirect("Index.aspx");
LblError.Visible = false;
}
else
{
LblError.Visible = true;
LblError.Text = "Login Failed!";
}
最佳答案
使用 Ajax 扩展，这是一个简单的例子:
.aspx 文件
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:TextBox runat="server" id="username" name="username" placeholder="Enter Username"></asp:TextBox>
<asp:TextBox name="passwd" ID="passwd" runat="server" placeholder="Enter Password"></asp:TextBox>
<asp:Button ID="Button1" runat="server" Text="Login" onclick="Button1_Click" />
<br />
<asp:Label ID="LblError" runat="server"></asp:Label>
</ContentTemplate>
</asp:UpdatePanel>
</div>
</form>
</body>
</html>
aspx.cs 文件 - 将其添加到登录按钮的 Click 事件中
protected void Button1_Click(object sender, EventArgs e)
{
string sql = "";
SqlConnection cn = null;
SqlCommand cmd = null;
SqlDataReader dr = null;
string User = username.Text;
string Pwd = passwd.Text;
//cn = "<< your connection string>>";
try
{
cn.Open();
// Your code
sql = "EXEC dbo.sProc_Admin_Auth @UserNm = '" + User + "',@Pwd = '" + Pwd + "'";
cmd = new SqlCommand(sql, cn);
dr = cmd.ExecuteReader();
if (dr.Read())
{
Session["UserId"] = dr["UserId"].ToString();
Session["LoginId"] = User;
Session["UserNm"] = dr["FullNm"].ToString();// "Jayasurya Satheesh";
Session["Email"] = dr["Email"].ToString();
Session["JoinDt"] = dr["CreateDt"].ToString();
Response.Redirect("Index.aspx");
LblError.Visible = false;
}
else
{
LblError.Visible = true;
LblError.Text = "Login Failed!";
}
}
catch (Exception exce)
{
LblError.Text = exce.Message;
}
finally
{
cn.Close();
}
}
You can find UpdatePanel and ScriptManager under Toolbox -> Ajax Extension
Use try-catch block to handle runtime exceptions.
关于c# - 在 ASP.NET 中从数据库中获取数据而不刷新页面，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/47966467/