ASP と C# の使用に問題があります。1 つはトピックを表示し、もう 1 つはサブトピックを表示する 2 つのドロップダウン リストを持つフォームを持っています。ユーザーがトピックを表示する権限を持っているかどうかをチェックする StoredProcedure を追加しました。ドロップダウンリスト、それは正常に動作しますが、トピックを選択すると常に最初のオプションに戻るだけです。バインドプットのためにポストバックについて読んだことがありますが、ここで動作するようには見えませんが、私のコードです...また、sqladapterを使用して同じ問題を試しました....
ストアド プロシージャ
USE [Forum]
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER PROCEDURE [dbo].[SP_verutilizadorTopico]
(
@id_user int
)
AS
SELECT UtilizadorTopico.IdTopico, Topico.Id_topico, Topico.Nome FROM UtilizadorTopico INNER JOIN Topico ON UtilizadorTopico.IdTopico = Topico.Id_topico WHERE (UtilizadorTopico.IdUtilizador = @id_user )
RETURN
そして私のC＃コード
using System;
using System.Data;
using System.Data.SqlClient;
using System.Linq;
using System.Web.UI.WebControls;
using System.Configuration;
using System.Drawing;
using System.Windows.Forms;
using System.Collections.Generic;
using System.ComponentModel;
using System.Text;
public partial class About : System.Web.UI.Page
{
string loginid = "";
SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["forumConnectionString2"].ToString());
public void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
topico1();
BindRepeaterData();
BindRepeaterDataPost();
}
SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["forumConnectionString2"].ToString()); //definição do comando sql
conn.Open();
//Cria uma objeto do tipo comando passando como parametro a string sql e a string de conexão
//Adicionando o valor das textBox nos parametros do comando
SqlCommand comm = conn.CreateCommand();
comm.CommandType = CommandType.StoredProcedure;
comm.CommandText = "SP_veruseraposlogin";
comm.Parameters.AddWithValue("@nome", Page.User.Identity.Name);
SqlDataReader rdr = comm.ExecuteReader();
if (rdr.HasRows)
{
while (rdr.Read())
{
loginid = rdr["Id"].ToString();
}
Lblidlog.Text = loginid;
conn.Close();
}
}
public void topico1()
{
SqlConnection conn2 = new SqlConnection(ConfigurationManager.ConnectionStrings["forumConnectionString2"].ToString()); //definição do comando sql
conn2.Open();
//Cria uma objeto do tipo comando passando como parametro a string sql e a string de conexão
//Adicionando o valor das textBox nos parametros do comando
SqlCommand comm2 = conn2.CreateCommand();
comm2.CommandType = CommandType.StoredProcedure;
comm2.CommandText = "SP_verutilizadorTopico";
comm2.Parameters.AddWithValue("@id_user", loginid);
SqlDataReader rdrtop = comm2.ExecuteReader();
droptopico.DataSource = rdrtop;
droptopico.DataTextField = "Nome";
droptopico.DataValueField = "Id_topico";
droptopico.DataBind();
rdrtop.Close();
conn2.Close();
}
protected void BindRepeaterData()
{
conn.Open();
SqlCommand cmd = new SqlCommand("select * from Mensagem where id_subtopico = @id_sub Order By data desc", conn);
DataSet ds = new DataSet();
if (dropsub.SelectedValue != "")
{
cmd.Parameters.AddWithValue("@id_sub", this.dropsub.SelectedValue);
}
else
{
cmd.Parameters.AddWithValue("@id_sub", 1);
}
SqlDataAdapter da = new SqlDataAdapter(cmd);
da.Fill(ds);
RepDetails.DataSource = ds;
RepDetails.DataBind();
conn.Close();
}
protected void DropsubSelectedIndexChanged(object sender, EventArgs e)
{
SqlConnection conn2 = new SqlConnection(ConfigurationManager.ConnectionStrings["forumConnectionString2"].ToString()); //definição do comando sql
conn2.Open();
SqlCommand comm2 = conn2.CreateCommand();
comm2.CommandType = CommandType.StoredProcedure;
comm2.CommandText = "SP_verutilizadorTopico";
comm2.Parameters.AddWithValue("@id_user", loginid);
comm2.Parameters.AddWithValue("@id_topico", droptopico.SelectedValue);
BindRepeaterData();
BindRepeaterDataPost();
}
protected void BindRepeaterDataPost()
{
conn.Open();
SqlCommand cmd = new SqlCommand("SELECT Post.*, Ficheiro.Nome FROM Ficheiro INNER JOIN Post ON Ficheiro.IdFicheiro = Post.IdFicheiro where Post.id_subtopico = @Id_sub Order By data desc", conn);
DataSet ds = new DataSet();
if (dropsub.SelectedValue != "")
{
cmd.Parameters.AddWithValue("@id_sub", this.dropsub.SelectedValue);
}
else
{
cmd.Parameters.AddWithValue("@id_sub", 1);
}
SqlDataAdapter da = new SqlDataAdapter(cmd);
da.Fill(ds);
RepDetailsPost.DataSource = ds;
RepDetailsPost.DataBind();
conn.Close();
}
protected void Button1_Click(object sender, EventArgs e)
{
//definição da string de conexão
SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["forumConnectionString2"].ToString()); //definição do comando sql
conn.Open();
SqlCommand sqlCommand = conn.CreateCommand();
sqlCommand.CommandType = CommandType.StoredProcedure;
sqlCommand.CommandText = "usp_inserirmsg";
sqlCommand.Parameters.AddWithValue("@id_sub", this.dropsub.SelectedValue);
sqlCommand.Parameters.AddWithValue("@nome_user", Page.User.Identity.Name);
sqlCommand.Parameters.AddWithValue("@msg", this.txtmsg.Text);
sqlCommand.ExecuteNonQuery();
this.lblstatusmsg.ForeColor = Color.FromArgb(255, 6, 255, 196);
lblstatusmsg.Text = "Mensagem enviada";
conn.Close();
}
protected void novocomentario_Click(object sender, System.Web.UI.ImageClickEventArgs e)
{
Panel1.Visible = true;
}
}
Topico1() は、ドロップダウンリストにバインドする場所です。