# Creating a New ASP.NET Web Form Project

To start, open Visual Studio and select "ASP.NET" under the "Create a new project" section.

# Choosing the ASP.NET Web Forms Template

In the next window, select the ".NET Framework" version that you want to use for your project. For this example, we will use ".NET Framework 4.8."

# Saving the Project

Your new ASP.NET web form project should now be created in Visual Studio.

# Importing the System.Data.SqlClient Namespace

using System.Data.SqlClient;

# Defining the Connection String

string connectionString = "Data Source=<Your Server Name>;Initial Catalog=<Your Database Name>;Integrated Security=True";

# Creating a Temporary DataTable

using System.Data;

DataTable tempTable = new DataTable();
tempTable.Columns.Add("ID", typeof(int));
tempTable.Columns.Add("Name", typeof(string));

string query = "SELECT ID, Name FROM RealTable";
SqlDataReader reader = connection.ExecuteReader(query);

while (reader.Read())
{
    DataRow row = tempTable.NewRow();
    row["ID"] = reader["ID"];
    row["Name"] = reader["Name"].ToString();
    tempTable.Rows.Add(row);
}

connection.Close();

# Looping Through the Temporary DataTable

int i = 0;
while (i < tempTable.Rows.Count)
{
    DataRow row = tempTable.Rows[i];
    // Code to compare and update real table goes here
    i++;
}

# Creating a Stored Procedure

CREATE PROCEDURE UpdateRealTable
    @tempTable DATETIME TABLE(HID, ItemName)
AS
BEGIN
    DECLARE @i INT = 0;
    WHILE (@i < (SELECT COUNT(*) FROM tempTable))
    BEGIN
        DECLARE @id INT = (SELECT ID FROM tempTable WHERE HID = @i);
        DECLARE @name VARCHAR(50) = (SELECT Name FROM tempTable WHERE HID = @i);

        IF NOT EXISTS (SELECT * FROM RealTable WHERE ID = @id)
        {
            INSERT INTO RealTable (ID, Name) VALUES (@id, @name);
        }
        ELSE
        {
            UPDATE RealTable SET Name = @name WHERE ID = @id;
        }

        SET @i = @i + 1;
    END;
END;

# Calling the Stored Procedure

connection.Open();
UpdateRealTable(tempTable);
connection.Close();

# Creating a Temporary DataTable

// ... (same code as above)

# Comparing Values Between Both Tables

// ... (same code as above)

# Calling the Stored Procedure

// ... (same code as above)

# Deploying the Project

To deploy your project, follow these steps:

1. Open Visual Studio and select "File" > "Build Solution."
2. Once the build is complete, open the "Solution Explorer" and find the project you want to deploy.
3. Right-click on the project and select "Publish."
4. Choose a location to publish the project and click on "OK."

Once your project has been deployed, users can access it through a web browser.

### Step 3: Maintaining the Project

To maintain our project, we need to regularly back up our database and update our connection string if necessary. We also need to monitor our database for any errors or inconsistencies.

```markdown
# Maintaining the Project

To maintain your project, follow these steps:

1. Regularly backup your database using SQL Server Management Studio.
2. Update your connection string as needed in case of changes to your database.
3. Monitor your database for any errors or inconsistencies using SQL Server Management Studio.

By following these steps, you can ensure that your project remains stable and secure over time.

### Step 4: Future Development

There are several areas where we can improve our project further:

1. We can add more features to the repeater control, such as editing existing data.
2. We can use LINQ to query the real table instead of using SQL Server Management Studio.
3. We can create a user interface that allows users to select which data they want to update.

```markdown
# Future Development

To further develop your project, follow these steps:

1. Add more features to the repeater control by modifying the stored procedure and adding new methods to retrieve or insert data.
2. Use LINQ to query the real table instead of using SQL Server Management Studio for data retrieval.
3. Create a user interface that allows users to select which data they want to update.

By following these steps, you can continue to improve and expand your project over time.