в 15:30, 26 мая 2010

2010-05-26T15:30:57Z

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2010-05-26T11:56:34Z

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== Call stored procedure to query data table (VB.net)==



<source lang="csharp">
<%@ Page Language="VB" %>
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Data.OleDb" %>
<script runat="server">
"declare connection
dim Conn as new OleDbConnection( _
"PROVIDER=Microsoft.Jet.OLEDB.4.0;" _
& "DATA SOURCE=" _
& Server.MapPath("EmployeeDatabase.mdb;"))
sub Submit(Sender as Object, e as EventArgs)
dim objCmd as OleDbCommand = new OleDbCommand("SelectIDFromName", Conn)
dim objReader as OleDbDataReader
objCmd.rumandType = CommandType.StoredProcedure
dim objParam as OleDbParameter
objParam = objCmd.Parameters.Add("@FirstName", OleDbType.Char)
objParam.Direction = ParameterDirection.Input
objParam.Value = tbFirst.Text
objParam = objCmd.Parameters.Add("@LastName",OleDbType.Char)
objParam.Direction = ParameterDirection.Input
objParam.Value = tbLast.Text
try
objCmd.Connection.Open()
objReader = objCmd.ExecuteReader
catch ex as OleDbException
Response.Write("Error retrieving data.")
end try
DataGrid1.DataSource = objReader
DataGrid1.DataBind()
objCmd.Connection.Close()
End Sub

</script>
<html><body>
<form runat="server">
Enter a first name:
<asp:TextBox id="tbFirst" runat="server"/><br>
Enter a last name:
<asp:TextBox id="tbLast" runat="server"/>
<asp:Button id="btSubmit" runat="server"
Text="Submit"
OnClick="Submit"/>
<asp:DataGrid id="DataGrid1" runat="server"
AutoGenerateColumns="true" />
</form>
</body></html></source>

== Handling Output Parameters from a Stored Procedure==



<source lang="csharp">
<%@ Page Language="C#" AutoEventWireup="true"%>
<%@ Import Namespace="System.Text" %>
<script runat="server">
void deptSource_Selected(Object sender, System.Web.UI.WebControls.SqlDataSourceStatusEventArgs e)
{
StringBuilder builder = new StringBuilder();
foreach (System.Data.SqlClient.SqlParameter param in e.rumand.Parameters)
{
builder.Append(Server.HtmlEncode(param.ParameterName) + "=");
builder.Append(Server.HtmlEncode(param.Value.ToString()) + " (");
builder.Append(Server.HtmlEncode(param.Value.GetType().ToString()) + ")<br>");
}
lblResult.Text = "Output Parameter : " + builder.ToString();
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>Handling Output Parameters from a Stored Procedure</title>
</head>
<body>
<form id="form1" runat="server">
<asp:GridView ID="deptView" AllowSorting="true" AllowPaging="true" Runat="server"
DataSourceID="deptSource" DataKeyNames="DepartmentID"
AutoGenerateColumns="False" HeaderStyle-HorizontalAlign="Center" HeaderStyle-Font-Bold="True"
HeaderStyle-BackColor="blue" HeaderStyle-ForeColor="White">
<Columns>
<asp:BoundField ReadOnly="true" HeaderText="Department ID" DataField="DepartmentID" SortExpression="DepartmentID" />
<asp:BoundField HeaderText="Name" DataField="Name" SortExpression="Name" />
<asp:BoundField HeaderText="Group Name" DataField="GroupName" SortExpression="GroupName" />
<asp:BoundField HeaderText="ModifiedDate" DataField="ModifiedDate" SortExpression="ModifiedDate" />
</Columns>
</asp:GridView>
<asp:SqlDataSource ID="deptSource" Runat="server" SelectCommandType="StoredProcedure"
SelectCommand="GetDepartments"
ConnectionString="<%$ ConnectionStrings:AdventureWorks%>" OnSelected="deptSource_Selected">
<SelectParameters>
<asp:Parameter Direction="Output" Name="Count" Type="Int32" />
</SelectParameters>
</asp:SqlDataSource>
<asp:Label runat="server" Font-Bold="true" ID="lblResult" />
</form>
</body>
</html></source>

== Handling Return Parameters from a Stored Procedure==



<source lang="csharp">
<%@ Page Language="C#" AutoEventWireup="true"%>
<%@ Import Namespace="System.Text" %>
<script runat="server">
void deptSource_Selected(Object sender, System.Web.UI.WebControls.SqlDataSourceStatusEventArgs e)
{
StringBuilder builder = new StringBuilder();
foreach (System.Data.SqlClient.SqlParameter param in e.rumand.Parameters)
{
builder.Append(Server.HtmlEncode(param.ParameterName) + "=");
builder.Append(Server.HtmlEncode(param.Value.ToString()) + " (");
builder.Append(Server.HtmlEncode(param.Value.GetType().ToString()) + ")<br>");
}
lblResult.Text = "Return Parameter : " + builder.ToString();
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>Handling Return Parameters from a Stored Procedure</title>
</head>
<body>
<form id="form1" runat="server">
<asp:GridView ID="deptView" AllowSorting="true" AllowPaging="true" Runat="server"
DataSourceID="deptSource" DataKeyNames="DepartmentID"
AutoGenerateColumns="False" HeaderStyle-HorizontalAlign="Center" HeaderStyle-Font-Bold="True"
HeaderStyle-BackColor="blue" HeaderStyle-ForeColor="White">
<Columns>
<asp:BoundField ReadOnly="true" HeaderText="Department ID" DataField="DepartmentID" SortExpression="DepartmentID" />
<asp:BoundField HeaderText="Name" DataField="Name" SortExpression="Name" />
<asp:BoundField HeaderText="Group Name" DataField="GroupName" SortExpression="GroupName" />
<asp:BoundField HeaderText="ModifiedDate" DataField="ModifiedDate" SortExpression="ModifiedDate" />
</Columns>
</asp:GridView>
<asp:SqlDataSource ID="deptSource" Runat="server" SelectCommandType="StoredProcedure"
SelectCommand="GetDepartments"
ConnectionString="<%$ ConnectionStrings:AdventureWorks%>" OnSelected="deptSource_Selected">
<SelectParameters>
<asp:Parameter Direction="ReturnValue" Name="ReturnValue" Type="Int32" />
</SelectParameters>
</asp:SqlDataSource>
<asp:Label runat="server" Font-Bold="true" ID="lblResult" />
</form>
</body>
</html></source>

== Use SQL Server stored procedures to insert a new record and then retrieve the identity value==



<source lang="csharp">
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="RetrieveIdentity" %>
<!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 id="Head1" runat="server">
<title>Inserting data and retrieving Identity value using Stored Procedures</title>
</head>
<body>
<form id="form1" runat="server">
<div id="container">
<h2>Enter a new publisher</h2>
<asp:TextBox ID="txtName" runat="server" /><br />
<asp:Button ID="btnAdd" runat="server" Text="Add Publisher" OnClick="btnAdd_Click" />

<asp:Label ID="labMsg" runat="server" />

</div>
</form>
</body>
</html>
File: Default.aspx.cs
using System;
using System.Data;
using System.Configuration;
using System.Collections;
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 RetrieveIdentity : System.Web.UI.Page
{
protected void btnAdd_Click(object sender, EventArgs e)
{
string connString = ConfigurationManager.ConnectionStrings["Book"].ConnectionString;
SqlConnection conn = new SqlConnection(connString);
try
{
conn.Open();
SqlCommand cmd = new SqlCommand();
cmd.Connection = conn;
cmd.rumandText = "CreatePublisher";
cmd.rumandType = CommandType.StoredProcedure;
cmd.Parameters.AddWithValue("@pubName", txtName.Text);
SqlParameter param = new SqlParameter();
param.ParameterName = "@pubId";
param.Size = 4;
param.SqlDbType = SqlDbType.Int;
param.Direction = ParameterDirection.Output;
cmd.Parameters.Add(param);
int nrows = cmd.ExecuteNonQuery();
string msg = nrows + " row was added<br/>";
int id = (int)param.Value;
msg += "PublisherId of new record=" + id;
labMsg.Text = msg;
conn.Close();
}
catch (Exception ex)
{
labMsg.Text = "Error occurred accessing the database";
labMsg.Text += "<br/>" + ex.Message;
}
finally
{
conn.Close();
}
}
}</source>

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ASP.NET Tutorial/ADO.net Database/Stored procedure - История изменений

в 15:30, 26 мая 2010

Admin: 1 версия