Refreshing Dataset and Updating the Label with SQL

In this article, we will explore how to refresh a dataset after a given time and update the label accordingly. We’ll use a stored procedure to retrieve data from a database and display it on a webpage. The goal is to update the label every 8 hours.

Background

To understand this topic, let’s first review some essential concepts:

• Stored Procedures: These are pre-written SQL commands that can be executed on a database server to perform specific tasks.
• Datasets and Labels: In web development, datasets typically refer to collections of data retrieved from a database, while labels represent text or values displayed on a webpage.

The Challenge

Our goal is to:

1. Update the label every 8 hours
2. Refresh the dataset after a given time

We’ll start by understanding how stored procedures work and then explore ways to refresh datasets and update labels.

Stored Procedures

Stored procedures are SQL commands that can be executed on a database server to perform specific tasks. They allow us to encapsulate complex logic in a single command, making it easier to maintain and reuse code.

In the provided example, the uspGetPackStatisticsPerShift stored procedure retrieves data from the Production.dbo.PackHistory, Production.dbo.PackStageHistory, Production.dbo.ItemSerialNumber, Production.dbo.ItemMaster, Production.dbo.ItemSeriesMaster, and Production.dbo.ItemFrameSizeMaster tables.

Refreshing Dataset

To refresh a dataset, we need to retrieve new data from the database. We can do this by running a stored procedure or executing a SQL query that fetches fresh data.

In our case, we want to update the label every 8 hours. This means we’ll need to run the stored procedure with updated parameters.

Updating the Label

Once we’ve retrieved new data, we need to display it on the webpage in an accessible format (e.g., HTML). We can do this by binding the dataset to a control (e.g., a GridView or ListBox) using web development frameworks like ASP.NET.

However, updating labels directly requires more complex logic. In our case, we’ll use the retrieved data to calculate new values and display them on the webpage.

Calculating New Values

To update labels, we need to perform calculations on the retrieved data. For example, if we have a dataset containing hourly packing statistics, we might want to calculate new labels based on these values.

Here’s an updated version of the stored procedure that calculates new labels:

{< highlight csharp >}
public void UpdateLabels()
{
    BizManager biz = new BizManager();

    // Retrieve data from database
    GridView1.DataSource = biz.GetPacktstatisticsForShift(DateTime.Today, DateTime.Today.AddDays(1).AddMinutes(-1)).DefaultView;

    // Calculate new labels based on retrieved data
    int totalPackedHourly = 0;
    for (int i = 0; i < ((GridView1 as DataGrid).Items.Count) - 1; i++)
    {
        DataRow row = GridView1.Rows[i];
        totalPackedHourly += Convert.ToInt32(row["TotalPacked"]);
    }

    // Display new labels on webpage
    lblPackingStatistics.Text = "New Label Based on Total Packaged: " + totalPackedHourly.ToString();
}
{/< /highlight >}

Refreshing Dataset and Updating Labels

Now that we have an updated version of the stored procedure, let’s refresh the dataset and update labels using C#:

{< highlight csharp >}
protected void Page_Load(object sender, EventArgs e)
{
    // Check if it's time to update labels (every 8 hours)
    DateTime now = DateTime.Now;
    if ((now - DateTime.Parse("00:00:00")) % TimeSpan.FromHours(8) == TimeSpan.Zero)
    {
        UpdateLabels();
    }
}
{/< /highlight >}

Conclusion

In this article, we explored how to refresh a dataset after a given time and update labels accordingly. We used a stored procedure to retrieve data from the database and calculated new values based on this data.

By understanding how stored procedures work and updating our logic to calculate new values, we can effectively refresh datasets and display updated labels on a webpage.

Please note that the above is a simplified example and might need adjustments according to your actual requirements.

Last modified on 2024-04-02