个人学习代码保存:例9.在存储过程中使用cast 类型转换的实例

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个人学习代码保存:例9.在存储过程中使用cast 类型转换的实例

存储过程：

ALTER PROCEDURE dbo.GetTitleTop

    (
    @kindid int,
    @IntTop int
    )

AS

    declare @sql varchar(200)
    set @sql='select top '+cast(@IntTop as varchar)+' * from guestbook where kindid='+cast(@kindid as varchar)
    EXEC (@sql)
    RETURN

前台代码：

<%@ Page Language="C#" AutoEventWireup="true"  CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>无标题页</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        KindId:<asp:TextBox ID="txtKindId" runat="server"></asp:TextBox>
        <br />
        条数:   <asp:TextBox ID="txtIntTop" runat="server"></asp:TextBox><br />
        <asp:Button ID="Button1" runat="server" Text="查看" OnClick="Button1_Click1" />
        <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" CellPadding="4"
            ForeColor="#333333" GridLines="None">
            <FooterStyle BackColor="#990000" Font-Bold="True" ForeColor="White" />
            <Columns>
                <asp:BoundField DataField="id" HeaderText="序号" />
                <asp:BoundField DataField="kindId" HeaderText="类型编号" />
                <asp:BoundField DataField="title" HeaderText="标题" />
                <asp:BoundField DataField="body" HeaderText="内容" />
            </Columns>
            <RowStyle BackColor="#FFFBD6" ForeColor="#333333" />
            <SelectedRowStyle BackColor="#FFCC66" Font-Bold="True" ForeColor="Navy" />
            <PagerStyle BackColor="#FFCC66" ForeColor="#333333" HorizontalAlign="Center" />
            <HeaderStyle BackColor="#990000" Font-Bold="True" ForeColor="White" />
            <AlternatingRowStyle BackColor="White" />
        </asp:GridView>
    </div>
    </form>
</body>
</html>

后台代码：

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }

    protected void Button1_Click1(object sender, EventArgs e)
    {
        string connstr = ConfigurationManager.AppSettings["ConnectionString"].ToString();
        SqlConnection con = new SqlConnection(connstr);
        if (con.State.Equals(ConnectionState.Closed))
        {
            con.Open();
        }
        string procName = "dbo.GetTitleTop";
        SqlCommand cmd = new SqlCommand(procName, con);
        cmd.CommandType = CommandType.StoredProcedure;
        cmd.Parameters.Add("@kindid", SqlDbType.Int);
        cmd.Parameters.Add("@IntTop", SqlDbType.Int);
        cmd.Parameters[0].Value = Convert.ToInt32(this.txtKindId.Text.Trim());
        cmd.Parameters[1].Value = Convert.ToInt32(this.txtIntTop.Text.Trim());
        SqlDataReader sdr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
        this.GridView1.DataSource = sdr;
        this.GridView1.DataBind();
    }
}

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原文地址：https://www.cnblogs.com/wbcms/p/1037564.html