Question

I’ve got a gridview displaying product instance info; I need a hyperlink in my Action column to bring up an view/edit page that displays the row data. How do I make the link bring up the data from that specific row into the edit page?

Note: there are other questions with similar titles, however, they do not cover this specific topic.

Answer 1

Use datakeys in the gridview, using datakey will get you the id of each clicked hyperlink , and then you can use that id to edit or delete the selected items easily. In the code behind just find the hyperlink control , pass the data key and write d update sql for it. Inorder to move your data to other pages you can sessions but if you are developing a commercial website session wont be a good idea due to its security issues, use cookies in that case .

 protected void Page_Load(object sender, EventArgs e)
{   
    if (!Page.IsPostBack)
    {
        if (Request.QueryString["productID"] != null)
        {
            productID = Convert.ToInt32(Request.QueryString["productID"]);
            bindData(productID)
        }
        ...
    }
 }
   protected void bindData(int productID)
    {
     //to avoid sql injection as mentioned below use parameters 
      SqlConnection conn = new SqlConnection(ConnectionString); // define connection string globally or in your business logic
      conn.Open();
      SqlCommand sql = new SqlCommand("Select * From [Table] Where ID = @productID",conn);
      SqlParameter parameter = new SqlParameter();
      parameter.ParameterName = "@ID";
   parameter.Value = productID;
       sql.Parameters.Add(parameter);
       conn.close()
  }

You can also use Microsoft.ApplicationBlocks.Data.dll to avoid repeating ado.net , it will reduce your code.