Show Sql Server Instance On The Network In ASP.NET Web Forms

The key is the SqlDataSourceEnumerator to display all instances. You can use gridview or ajax controls for display purposes.

protected void Page_Load(object sender, EventArgs e)  
      {  
        // Retrieve the enumerator instance and then the data.  
        SqlDataSourceEnumerator instance = SqlDataSourceEnumerator.Instance;  
        System.DataDataTable table = instance.GetDataSources();  
        // Display the contents of the table.  
        DisplayData(table);  
      }  

      private void DisplayData(System.DataDataTable table)  
      {  
        foreach (System.DataDataRow row in table.Rows)  
        {  
          foreach (System.DataDataColumn col in table.Columns)  
          {  
            Response.Write(String.Format("{0} = {1}<br>",  
              col.ColumnName, row[col]));  
          }  
        }  
      }