How to have multiple OnClick events in a single Repeater without Javascript?
Question
Below are the stored procedures that I have created:
CREATE PROCEDURE AdminViewProducts
@PageIndex INTEGER = 1,
@PageSize INTEGER = 10,
@RecordCount INTEGER OUTPUT
AS
BEGIN
SET NOCOUNT ON;
SELECT ROW_NUMBER()
OVER
(
ORDER BY Product_Category_Name
)AS RowNumber,
Product_No,
Product_Image,
Product_Name,
Barcode_No,
Product_Category_Name,
Product_Price,
Product_Quantity,
Grocery_Branch_Name
INTO #Results
FROM Product,Product_Category,Grocery_Branch
WHERE Product_Category.Product_Category_No = Product.Product_Category_No
AND Grocery_Branch.Grocery_Branch_No = Product.Grocery_Branch_No
SELECT * FROM #Results
WHERE RowNumber BETWEEN(@PageIndex -1) * @PageSize + 1
AND
(((@PageIndex -1) * @PageSize + 1) + @PageSize) - 1
SELECT @RecordCount = COUNT(*) FROM #Results
DROP TABLE #Results
END
CREATE PROCEDURE AdminSearchProduct
@ProductName VARCHAR(50),
@PageIndex INTEGER = 1,
@PageSize INTEGER = 10,
@RecordCount INTEGER OUTPUT
AS
BEGIN
SET NOCOUNT ON;
SELECT ROW_NUMBER() OVER
(
ORDER BY Product_Name
)
AS RowNumber,
Product_No,
Product_Image,
Product_Name,
Barcode_No,
Product_Category_Name,
Product_Price,
Product_Quantity,
Grocery_Branch_Name
INTO #Results
FROM Product,Product_Category,Grocery_Branch
WHERE Product_Category.Product_Category_No = Product.Product_Category_No
AND Grocery_Branch.Grocery_Branch_No = Product.Grocery_Branch_No
AND Product_Name LIKE '%' + @ProductName + '%'
SELECT * FROM #Results
WHERE RowNumber BETWEEN(@PageIndex -1) * @PageSize + 1
AND
(((@PageIndex -1) * @PageSize + 1) + @PageSize) - 1
SELECT @RecordCount = COUNT(*) FROM #Results
DROP TABLE #Results
END
Below is my code in ASPX
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<link href="CSS/searchtext.css" rel="stylesheet" />
<link href="CSS/searchproducts.css" rel="stylesheet" />
<form id="form1" runat="server">
<main>
<div class="content-wrap">
<h4 class="searchtext">
<strong>Search by Product Name</strong>
</h4>
<div class="searchproducts">
<asp:Table ID="Table1" runat="server" align="center">
<asp:TableRow ID="TableRow1" runat="server">
<asp:TableCell HorizontalAlign="Right">
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
</asp:TableCell>
<asp:TableCell HorizontalAlign="Left">
<asp:Button ID="Button8" runat="server" OnClick="Search_Product" ValidationGroup="SearchByName" Text="Search Product" />
<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ControlToValidate="TextBox1" ValidationGroup="SearchByName" ErrorMessage=" Please enter a product name" Font-Bold="True"></asp:RequiredFieldValidator>
<asp:Label ID="Label3" runat="server" Font-Bold="True"></asp:Label>
</asp:TableCell>
</asp:TableRow>
</asp:Table>
</div>
<br />
<br />
<div style="margin-left: 265px;">
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false" HorizontalAlign="Center" HeaderStyle-BackColor="#00a400" HeaderStyle-ForeColor="White">
<Columns>
<asp:BoundField DataField="Product_No" HeaderText="Product No" />
<asp:TemplateField HeaderText="Image">
<ItemTemplate>
<asp:Image ID="Image1" runat="server" Height="100px" Width="150px"
ImageUrl='<%#"data:Image/png/jpg/jpeg/gif/bmp;base64," + Convert.ToBase64String((byte[])Eval("Product_Image")) %>' />
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="Product_Name" HeaderText="Product" />
<asp:BoundField DataField="Barcode_No" HeaderText="Barcode" />
<asp:BoundField DataField="Product_Category_Name" HeaderText="Category" />
<asp:BoundField DataField="Product_Price" HeaderText="Price" DataFormatString="{0:0.00} AUD" />
<asp:BoundField DataField="Product_Quantity" HeaderText="Quantity" />
<asp:BoundField DataField="Grocery_Branch_Name" HeaderText="Branch" />
</Columns>
</asp:GridView>
<br />
<table style="align-content:center; width:800px;">
<tr>
<td>
<asp:Repeater ID="rptPager" runat="server">
<ItemTemplate>
<asp:LinkButton ID="lnkPage" runat="server" Text='<%#Eval("Text") %>' CommandArgument='<%# Eval("Value") %>' Enabled='<%# Eval("Enabled") %>' OnClick="lnkbtn_PageIndexChanged" ForeColor="#00a400"></asp:LinkButton>
</ItemTemplate>
</asp:Repeater>
</td>
</tr>
</table>
</div>
</div>
</main>
</body>
</html>
Below is my C# code
using System;
using System.Collections.Generic;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.SqlClient;
using System.Configuration;
using System.Data;
namespace Grocery_Demo
{
public partial class AdminViewProducts : System.Web.UI.Page
{
int PageSize = 10;
protected void Page_Load(object sender, EventArgs e)
{
if (Session["UsernameAdmin"] != null && Session["PasswordAdmin"] != null && Session["BranchAdmin"] != null)
{
string username = Session["UsernameAdmin"].ToString();
string password = Session["PasswordAdmin"].ToString();
string branch = Session["BranchAdmin"].ToString();
string CS = ConfigurationManager.ConnectionStrings["Grocery_DemoConnectionString"].ConnectionString;
SqlConnection con = new SqlConnection(CS);
SqlCommand cmd = new SqlCommand("AdminValidation", con);
cmd.CommandType = System.Data.CommandType.StoredProcedure;
cmd.Parameters.AddWithValue("@AdministratorUsername", username);
cmd.Parameters.AddWithValue("@AdministratorPassword", password);
cmd.Parameters.AddWithValue("@GroceryBranchName", branch);
con.Open();
SqlDataReader read = cmd.ExecuteReader();
read.Read();
if (read.HasRows == false)
{
Response.Redirect("SignIn.aspx");
}
con.Close();
}
else
{
Response.Redirect("SignIn.aspx");
}
Label1.Text = Session["BranchAdmin"].ToString();
Label2.Text = Session["UsernameAdmin"].ToString();
{
if (!Page.IsPostBack)
DisplayProducts(1, PageSize);
}
}
SqlDataAdapter da;
DataSet ds = new DataSet();
private void DisplayProducts(int PageIndex, int PageSize)
{
string CS = ConfigurationManager.ConnectionStrings["Grocery_DemoConnectionString"].ConnectionString;
using (SqlConnection con = new SqlConnection(CS))
{
using (SqlCommand cmd = new SqlCommand("AdminViewProducts", con))
{
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.AddWithValue("@PageIndex", PageIndex);
cmd.Parameters.AddWithValue("@PageSize", PageSize);
cmd.Parameters.Add("@RecordCount", SqlDbType.Int, 4);
cmd.Parameters["@RecordCount"].Direction = ParameterDirection.Output;
da = new SqlDataAdapter(cmd);
da.Fill(ds);
con.Open();
cmd.ExecuteNonQuery();
if (ds.Tables[0].Rows.Count > 0)
{
GridView1.DataSource = ds.Tables[0];
GridView1.DataBind();
}
int recordCount = Convert.ToInt32(cmd.Parameters["@RecordCount"].Value);
this.PopulatePager(recordCount, PageIndex);
}
}
}
private void PopulatePager(int recordCount, int currentPage)
{
double dblPageCount = (double)((decimal)recordCount / (PageSize));
int pageCount = (int)Math.Ceiling(dblPageCount);
List<ListItem> pages = new List<ListItem>();
if (pageCount > 0)
{
pages.Add(new ListItem("FIRST >> ", "1", currentPage > 1));
for (int i = 1; i <= pageCount; i++)
{
pages.Add(new ListItem(i.ToString(), i.ToString(), i != currentPage));
}
pages.Add(new ListItem(" << LAST", pageCount.ToString(), currentPage < pageCount));
}
rptPager.DataSource = pages;
rptPager.DataBind();
}
protected void lnkbtn_PageIndexChanged(object sender, EventArgs e)
{
int pageIndex = int.Parse((sender as LinkButton).CommandArgument);
DisplayProducts(pageIndex, PageSize);
}
protected void Search_Product(object sender, EventArgs e)
{
int PageIndex = 1;
string CS = ConfigurationManager.ConnectionStrings["Grocery_DemoConnectionString"].ConnectionString;
using (SqlConnection con = new SqlConnection(CS))
{
using (SqlCommand cmd = new SqlCommand("AdminSearchProduct", con))
{
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.AddWithValue("@ProductName", TextBox1.Text + "%");
cmd.Parameters.AddWithValue("@PageIndex", PageIndex);
cmd.Parameters.AddWithValue("@PageSize", PageSize);
cmd.Parameters.Add("@RecordCount", SqlDbType.Int, 4);
cmd.Parameters["@RecordCount"].Direction = ParameterDirection.Output;
da = new SqlDataAdapter(cmd);
da.Fill(ds);
con.Open();
cmd.ExecuteNonQuery();
if (ds.Tables[0].Rows.Count > 0)
{
GridView1.DataSource = ds.Tables[0];
GridView1.DataBind();
}
else
{
Label3.Text = " Couldn't find your product";
}
int recordCount = Convert.ToInt32(cmd.Parameters["@RecordCount"].Value);
this.PopulatePager(recordCount, PageIndex);
}
}
}
}
}
Compilation has been successful for all SQL Stored Procedure, C# file and ASPX file. In addition, DisplayProducts() method is successfully able to call the Stored Procedure "AdminViewProducts" and I am getting the desired output that I wanted which is shown below:
FIRST >> 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 << LAST
Therefore, there is no issue with DisplayProducts () method.
On the other hand, Search_Product () method called Stored Procedure "AdminSearchProduct" successfully and I got the desired the result that I wanted which is shown below:
FIRST >> 1 2 3 4 5 6 7 8 9 << LAST
However, there is one small issue in Search_Product() method. The issue is that if I click on any random page number (link button) such as 2 OR 6 OR 7 , I am getting a display that is based on DisplayProducts() method which is shown below:
FIRST >> 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 << LAST
But, I want to get this display instead after I click on any random page number (link button) such as 2 OR 6 OR 7 which is shown below:
FIRST >> 1 2 3 4 5 6 7 8 9 << LAST
This is the problem I am facing. In other words, there is minor issue in SearchProduct() method which needs to be fixed.
I did realize the problem though. If I go back to my aspx code, there is only one OnClickEvent inside the Repeater. And if I go back to my C# code, protected void lnkbtn_PageIndexChanged is calling DisplayProducts() only. However, I tried adding another line to call SearchProduct() under protected void lnkbtn_PageIndexChanged but I am still not able to solve the problem.
What I am trying to do is to have 2 OnClickEvent inside a single Repeater in order to solve this issue without using any Javascript.
It would be really helpful if my mistake in C# code and ASPX code is identified and appropriate solution is provided accordingly.
1 answers
solution1
0 2019-01-06 19:30:41
If I understood your problem correctly, you need to create a paging logic for presenting result.
Then your method in the controller should take a page number as parameter, which you can use to query your result from database.
Fx if you click on 2 your query should skip (2-1) * query size and take query size.
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