The Datalist control USES stored procedures to page through the implementation code

2020-05-19 04:29:36
OfStack

-- front desk: --

 
<body> 
<form id="form1" runat="server"> 
<div> 
<asp:DataList ID="DataList1" runat="server" 
onitemcommand="DataList1_ItemCommand" 
oncancelcommand="DataList1_CancelCommand" 
ondeletecommand="DataList1_DeleteCommand" oneditcommand="DataList1_EditCommand" 
onupdatecommand="DataList1_UpdateCommand" 
onitemdatabound="DataList1_ItemDataBound"> 
<EditItemTemplate> 
<table style="width: 100%; height: 180px;"> 
<tr> 
<td class="style4"> 
 Product name: </td> 
<td class="style2"> 
<asp:TextBox ID="txtProductName" runat="server" 
Text='<%# Eval("ProductName") %>'></asp:TextBox> 
</td> 
</tr> 
<tr> 
<td class="style4"> 
 Specifications: </td> 
<td class="style2"> 
<asp:TextBox ID="txtProductStandard" runat="server" 
Text='<%# Eval("ProductStandard") %>'></asp:TextBox> 
</td> 
</tr> 
<tr> 
<td class="style4"> 
 Packing rate: </td> 
<td class="style2"> 
<asp:TextBox ID="txtPackagingRatio" runat="server" 
Text='<%# Eval("PackagingRatio") %>'></asp:TextBox> 
</td> 
</tr> 
<tr> 
<td class="style4"> 
 Barcode for commodity: </td> 
<td class="style2"> 
<asp:TextBox ID="txtArticleNum" runat="server" Text='<%# Eval("ArticleNum") %>'></asp:TextBox> 
</td> 
</tr> 
<tr> 
<td class="style4"> 
 Price: </td> 
<td class="style2"> 
<asp:TextBox ID="txtPrice" runat="server" Text='<%# Eval("Price") %>'></asp:TextBox> 
</td> 
</tr> 
<tr> 
<td class="style4"> 
<asp:Button ID="btnUpdate" runat="server" CommandArgument='<%# Eval("PId") %>' 
CommandName="update" Height="21px" Text=" update " /> 
</td> 
<td class="style2"> 
<asp:Button ID="btnCancel" runat="server" CommandName="cancel" Text=" cancel " /> 
</td> 
</tr> 
</table> 
</EditItemTemplate> 
<ItemTemplate> 
 Product name :<asp:Label ID="Label1" runat="server" Text='<%# Eval("ProductName") %>'></asp:Label> 
<br /> 
 specifications :<asp:Label ID="Label2" runat="server" Text='<%# Eval("ProductStandard") %>'></asp:Label> 
<br /> 
 Packing rate :<asp:Label ID="Label3" runat="server" Text='<%# Eval("PackagingRatio") %>'></asp:Label> 
<br /> 
 Commodity codes :<asp:Label ID="Label4" runat="server" Text='<%# Eval("ArticleNum") %>'></asp:Label> 
<br /> 
 The supermarket price :<asp:Label ID="Label5" runat="server" Text='<%# Eval("Price") %>'></asp:Label> 
<br /> 
<asp:Button ID="btnEdit" runat="server" Text=" The editor " CommandName="Edit" /> 
 <asp:Button ID="btnDelete" runat="server" Text=" delete " 
CommandArgument='<%# Eval("PId") %>' CommandName="delete" /> 
<br /> 
<br /> 
<asp:Button ID="Button1" runat="server" CommandArgument='<%# Eval("PId") %>' 
CommandName="Buy" Text=" Put in the shopping cart " /> 
<br /> 
</ItemTemplate> 
</asp:DataList> 
<br /> 
<br /> 
<asp:Button ID="btnFirst" runat="server" onclick="btnFirst_Click" 
Text="|<" /> 
 <asp:Button ID="btnPrev" runat="server" onclick="btnPrev_Click" Text="<" 
style="height: 21px" /> 
 <asp:Button ID="btnNext" runat="server" onclick="btnNext_Click" Text=">" /> 
 <asp:Button ID="btnLast" runat="server" onclick="btnLast_Click" Text=">|" /> 
 <asp:Label ID="Label1" runat="server"></asp:Label> 
<asp:TextBox ID="txtPageNumber" runat="server" Height="26px" Width="43px"></asp:TextBox> 
<asp:CompareValidator ID="CompareValidator1" runat="server" 
ControlToValidate="txtPageNumber" Display="Dynamic" ErrorMessage=" Must be an integer! " 
ForeColor="#FF3300" Operator="DataTypeCheck" Type="Integer"></asp:CompareValidator> 
<asp:RangeValidator ID="RangeValidator1" runat="server" 
ControlToValidate="txtPageNumber" Display="Dynamic" ErrorMessage=" Illegal data entry! " 
ForeColor="Red" MaximumValue="9" MinimumValue="1"></asp:RangeValidator> 
<asp:Button ID="btnGo" runat="server" onclick="btnGo_Click" Text="Go" /> 
<br /> 
<asp:HiddenField ID="HiddenField1" runat="server" /> 
<asp:HiddenField ID="HiddenField2" runat="server" /> 
</div> 
</form> 
</body>

-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - the background: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

 
protected void Page_Load(object sender, EventArgs e) 
{ 
if (!IsPostBack) 
{ 
bindProduct(1); 
} 
} 
private void bindProduct(int pageIndex) 
{ 
string constr = ConfigurationManager.ConnectionStrings["studentConnectionString"].ConnectionString; 
using (SqlConnection con = new SqlConnection(constr)) 
{ 
con.Open(); 
using (SqlCommand cmd = con.CreateCommand()) 
{ 
cmd.CommandType = CommandType.StoredProcedure; 
cmd.CommandText = "sp_Product_Select_by_Page_rowNumber"; 
cmd.Parameters.AddWithValue("@pageSize", 3); 
cmd.Parameters.Add("@pageCount", System.Data.DbType.Int32).Direction = ParameterDirection.Output; 
cmd.Parameters.AddWithValue("@pageIndex", pageIndex); 
SqlDataAdapter adapter = new SqlDataAdapter(cmd); 
DataTable dt = new DataTable(); 
adapter.Fill(dt); 
this.DataList1.DataSource = dt; 
this.DataList1.DataBind(); 
int pageCount = Convert.ToInt32(cmd.Parameters["@pageCount"].Value); 
this.HiddenField1.Value = pageCount.ToString(); 
this.HiddenField2.Value = pageIndex.ToString(); 
} 
} 
} 
protected void DataList1_ItemCommand(object source, DataListCommandEventArgs e) 
{ 
if (e.CommandName == "Buy") 
{ 
Response.Write(e.CommandArgument.ToString()); 
} 
} 
protected void DataList1_EditCommand(object source, DataListCommandEventArgs e) 
{ 
this.DataList1.EditItemIndex = e.Item.ItemIndex; 
this.bindProduct(1); 
} 
protected void DataList1_UpdateCommand(object source, DataListCommandEventArgs e) 
{ 
string ProName = (e.Item.FindControl("txtProductName") as TextBox).Text; 
string ProStandarde = (e.Item.FindControl("txtProductStandard") as TextBox).Text; 
string ProPackaging = (e.Item.FindControl("txtPackagingRatio") as TextBox).Text; 
string ProArtialeNum = (e.Item.FindControl("txtArticleNum") as TextBox).Text; 
string ProPrice = (e.Item.FindControl("txtPrice") as TextBox).Text; 
string sql = "update Product set ProductName=@ProductName,ProductStandard=@ProductStandard,PackagingRatio=@PackagingRatio,ArticleNum=@ArticleNum,Price=@Price where PId=@pid"; 
SqlParameter[] pms = new SqlParameter[]{ 
new SqlParameter("@ProductName",ProName), 
new SqlParameter("@ProductStandard",ProStandarde), 
new SqlParameter("@PackagingRatio",ProPackaging), 
new SqlParameter("@ArticleNum",ProArtialeNum), 
new SqlParameter("@Price",ProPrice), 
new SqlParameter("@pid",e.CommandArgument) 
}; 
SQLHelper.ExecuteNonQuery(sql, pms); 
} 
protected void DataList1_CancelCommand(object source, DataListCommandEventArgs e) 
{ 
this.DataList1.EditItemIndex = -1; 
this.bindProduct(1); 
} 
protected void DataList1_DeleteCommand(object source, DataListCommandEventArgs e) 
{ 
string sql = "delete from Product where PId=@pid"; 
SqlParameter pms = new SqlParameter("@pid", e.CommandArgument); 
SQLHelper.ExecuteNonQuery(sql, pms); 
this.bindProduct(1); 
} 
protected void btnFirst_Click(object sender, EventArgs e) 
{ 
this.bindProduct(1); 
} 
protected void btnPrev_Click(object sender, EventArgs e) 
{ 
int index = Convert.ToInt32(this.HiddenField2.Value); 
if (index > 1) 
{ 
index--; 
this.bindProduct(index); 
} 
} 
protected void btnNext_Click(object sender, EventArgs e) 
{ 
int index = Convert.ToInt32(this.HiddenField2.Value); 
int pageCount = Convert.ToInt32(this.HiddenField1.Value); 
if (index<pageCount) 
{ 
index++; 
this.bindProduct(index); 
} 
} 
protected void btnLast_Click(object sender, EventArgs e) 
{ 
this.bindProduct(Convert.ToInt32(this.HiddenField1.Value)); 
} 
protected void btnGo_Click(object sender, EventArgs e) 
{ 
if (Convert.ToInt32(txtPageNumber.Text) <= Convert.ToInt32(HiddenField1.Value)) 
{ 
this.bindProduct(Convert.ToInt32(txtPageNumber.Text)); 
} 
else 
{ 
Response.Write(" The number of pages you entered exceeds the total number of pages, please re-enter if necessary! "); 
} 
} 
protected void DataList1_ItemDataBound(object sender, DataListItemEventArgs e) 
{ 
Label1.Text = " The first " + (HiddenField2.Value).ToString() + " Page, " + HiddenField1.Value.ToString() + " page "; 
}

-- stored procedure ----

 
CREATE PROCEDURE [dbo].[sp_Product_Select_by_Page_rowNumber] 
@pageSize int, -- Number of records per page  
@pageCount int output, -- Total number of pages  
@pageIndex int -- Current page index number  
AS 
BEGIN 
declare @totalRecords int 
select @totalRecords = count(PId) from Product 
if(@totalRecords % @pageSize = 0) 
set @pageCount = @totalRecords / @pageSize; 
else 
set @pageCount = @totalRecords / @pageSize +1; 
with temp as (select row_number() over (order by PId) as id,* from Product) 
select * from temp where id between (@pageIndex -1)*@pageSize +1 and @pageIndex * @pageSize 
return @totalRecords 
end 
GO

----------------Web.config:-------------------

 
<connectionStrings> 
<add name="studentConnectionString" connectionString="Data Source=PC_THINK-THINK;Initial Catalog=student;Persist Security Info=True;User ID=sa;Password=111111" 
providerName="System.Data.SqlClient" /> 
</connectionStrings>

-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- SQLHelper class: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

 
public static String connStr = ConfigurationManager.ConnectionStrings["studentConnectionString"].ConnectionString; 
public static int ExecuteNonQuery(string sql, params SqlParameter[] pms) 
{ 
using (SqlConnection con = new SqlConnection(connStr)) 
{ 
using (SqlCommand cmd = new SqlCommand(sql, con)) 
{ 
if (pms != null) 
{ 
cmd.Parameters.AddRange(pms); 
} 
con.Open(); 
return cmd.ExecuteNonQuery(); 
} 
} 
} 
public static DataTable ExecuteDataTable(string sql, params SqlParameter[] pms) 
{ 
DataTable dt = new DataTable(); 
SqlDataAdapter adapter = new SqlDataAdapter(sql,connStr); 
if (pms != null) 
{ 
adapter.SelectCommand.Parameters.AddRange(pms); 
} 
adapter.Fill(dt); 
return dt; 
}