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Jan 28, 2016 · Code: https://gist.github.com/Squiva/d466465b361bd23c0929 Download libraries (I DID NOT ...Duration: 20:33 Posted: Jan 28, 2016

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In the sample to follow, data binding for most controls is only simulated via code. More precisely, I use data binding to fill the list portion of the two DropDownList controls, but not to associate values in controls to the corresponding field in the Titles table. I ll also demonstrate how you can have the ddlPublishers DropDownList control look up a value in another table. The code behind this form isn t exactly trivial:

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{ // Build the outermost container table var outer = new Table(); var outerRow = new TableRow(); outer.Rows.Add(outerRow); // Ruler cell var rulerCell = new TableCell(); outerRow.Cells.Add(rulerCell); BuildGaugeBar(rulerCell); // Text cell var textCell = new TableCell(); if (!_textStyle.DisplayTextAtBottom) { outerRow.Cells.Add(textCell); BuildLabel(textCell); } // Save the control tree add the table as a child of the gauge Controls.Add(outer); // Build the label if (!_textStyle.RenderInsideTable && _textStyle.DisplayTextAtBottom) BuildLabel(null); } void BuildGaugeBar(TableCell container) { // Create the table with one or two rows: ruler (and label) var t = new Table(); var ruler = new TableRow(); t.Rows.Add(ruler); // Build the ruler row BuildRuler(ruler); // Build the label if (_textStyle.RenderInsideTable) BuildLabelIntoTable(t); // Save the control tree container.Controls.Add(t); }

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The output of the SimpleGaugeBar control consists of an outermost table that has one row and two cells. The first cell contains the gauge bar; the second cell optionally contains the text, when the companion text has to be displayed on the side of the gauge. (See Figure 12-2.) If the text goes below the gauge, it can either be part of the table (a second row) or just an additional Label control. You control rendering styles of the text through a custom style property the TextStyle property that I ll say more about in a moment. Let s first focus on the ruler.

Define a connection object that points to Pubs. Dim cn As New SqlConnection(SqlPubsConnString) Private Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) _ Handles MyBase.Load If Not IsPostBack Then

The ruler is a sequence of table cells. Each cell corresponds to a notch you want to see on the final gauge. The number of notches is determined by the Segments property. The Value property is scaled as a percentage of the Maximum value, and the resulting value is used to determine the color of the various cells. If the value to represent is larger than the value represented by the current notch, a cell is added with the average width determined by dividing 100 by the number of notches. The same happens if the value is smaller and the divider cell has been rendered already. (In this case, finished is true.)

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void BuildRuler(TableRow ruler) { // Calculate the value to represent var val = GetValueToRepresent(); float valueToRepresent = 100f * val / Maximum; var numOfSegments = GetNumOfSegments(); int segmentWidth = 100 / numOfSegments; bool finished = false; for (int i = 1; i <= numOfSegments; i++) { if (valueToRepresent < i * segmentWidth) { if (finished) { // Still-To-Do var stillToDo = new TableCell(); ruler.Cells.Add(stillToDo); stillToDo.Width = Unit.Percentage(segmentWidth); } else { // Cell to divide _dividerCell = i - 1; // need a 0-based index var cell = new TableCell(); ruler.Cells.Add(cell); cell.Width = Unit.Percentage(segmentWidth); cell.Height = Unit.Percentage(100); // Add a child table to the cell var child = new Table(); child.Width = Unit.Percentage(100); child.Height = Unit.Percentage(100); cell.Controls.Add(child); child.CellPadding = 0; child.CellSpacing = 0; var childRow = new TableRow(); child.Rows.Add(childRow); float fx = (100 * (valueToRepresent - segmentWidth * (i - 1)) / segmentWidth); if (valueToRepresent > (i - 1) * segmentWidth) { TableCell left = new TableCell();

FillListControl(ddlTitles, cn, Titles", title", title_id )

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