Scrollable multiple column header in datagridview

EDN Admin · Jun 18, 2012

<p style="margin-bottom:0.0001pt; line-height:normal Im working
on a custom datagrivew to create a gantt chart.
.
The
following code that I have recovered in 
other posts is ok for "not scrollable" multiple columns header datagridview.
In fact, if I 
use the first columns of the 
grid as a fixed(.frozen) the others orizzontally scrollable multiple columns header have problems:
The text of drawstring, when the size
of the rectangle is reduced, "stepwise" 
decreasesand not more gradually;
The text of drawstring, when the size
of the rectangle is reduced, decreases
"one character
at a time" and not more gradually;I ask someone some suggestions to correct
these problems.
<p style="margin-bottom:0.0001pt; line-height:normal
<p style="margin-bottom:0.0001pt; line-height:normal
<p style="margin-bottom:0.0001pt; line-height:normal <span style="font-size:10pt; font-family:Courier New; color:blue Private<span style="font-size:10pt; font-family:Courier New
<span style="color:blue Sub Form1_Load(<span style="color:blue ByVal sender
<span style="color:blue As System.Object, <span style="color:blue ByVal e
<span style="color:blue As System.EventArgs) 
<span style="color:blue Me.DataGridView1.Columns.Add(
<span style="color:blue Me.DataGridView1.Columns.Add(
<span style="color:blue Me.DataGridView1.Columns.Add(
<span style="color:blue Me.DataGridView1.Columns.Add(
<span style="color:blue Me.DataGridView1.Columns.Add(
<span style="color:blue Me.DataGridView1.Columns.Add(<span style="color:#a31515 "Winter",
<span style="color:#a31515 "Weekend")
<p style="margin-bottom:0.0001pt; line-height:normal 
<span style="color:blue For j <span style="color:blue As <span style="color:blue
Integer = 6 

<span style="color:blue Next
<p style="margin-bottom:0.0001pt; line-height:normal 
<span style="color:blue Me.DataGridView1.ColumnHeadersHeightSizeMode = DataGridViewColumnHeadersHeightSizeMode.EnableResizing

<span style="color:blue Me.DataGridView1.ColumnHeadersHeight = 
<span style="color:blue Me.DataGridView1.ColumnHeadersDefaultCellStyle.Alignment = DataGridViewContentAlignment.BottomCenter

<span style="color:blue AddHandler <span style="color:blue Me.DataGridView1.CellPainting,

<span style="color:blue AddHandler <span style="color:blue Me.DataGridView1.Paint,

<span style="color:blue AddHandler <span style="color:blue Me.DataGridView1.Scroll,




<span style="color:blue End <span style="color:blue Sub

<p style="margin-bottom:0.0001pt; line-height:normal <span style="font-size:10pt; font-family:Courier New; color:blue Private<span style="font-size:10pt; font-family:Courier New
<span style="color:blue Sub DataGridView1_CellPainting(<span style="color:blue ByVal sender
<span style="color:blue As <span style="color:blue Object, <span style="color:blue
ByVal e <span style="color:blue As System.Windows.Forms.DataGridViewCellPaintingEventArgs)

 -1 

r2.Y += e.CellBounds.Height / 2

r2.Height = e.CellBounds.Height / 2

e.PaintBackground(r2, 
e.PaintContent(r2)

e.Handled = 

<span style="color:blue End <span style="color:blue Sub

<p style="margin-bottom:0.0001pt; line-height:normal <span style="font-size:10pt; font-family:Courier New; color:blue Private<span style="font-size:10pt; font-family:Courier New
<span style="color:blue Sub DataGridView1_ColumnWidthChanged(<span style="color:blue ByVal sender
<span style="color:blue As <span style="color:blue Object, <span style="color:blue
ByVal e <span style="color:blue As System.Windows.Forms.DataGridViewColumnEventArgs)

<span style="color:blue Dim rtHeader <span style="color:blue As Rectangle =

rtHeader.Height = 
<span style="color:blue Me.DataGridView1.Invalidate(rtHeader)

<span style="color:blue End <span style="color:blue Sub
<p style="margin-bottom:0.0001pt; line-height:normal 
<span style="color:blue Private <span style="color:blue Sub DataGridView1_Paint(<span style="color:blue ByVal sender
<span style="color:blue As <span style="color:blue Object, <span style="color:blue
ByVal e <span style="color:blue As System.Windows.Forms.PaintEventArgs)



<span style="color:blue Dim header1 <span style="color:blue As
<span style="color:blue String() = {<span style="color:#a31515 "Kilometer",



<span style="color:blue Dim r1 <span style="color:blue As Rectangle =
<span style="color:blue Me.DataGridView1.GetCellDisplayRectangle(j, -1, 
<span style="color:blue Dim w2 <span style="color:blue As <span style="color:blue
Integer = <span style="color:blue Me.DataGridView1.GetCellDisplayRectangle(j, -1,

r1.X += 1

r1.Y += 1

r1.Width = r1.Width + w2 - 2

r1.Height = r1.Height / 2 - 2

e.Graphics.FillRectangle(<span style="color:blue New SolidBrush(
<span style="color:blue Dim format 
format.Alignment = StringAlignment.Center

format.LineAlignment = StringAlignment.Center

e.Graphics.DrawString(header1(j / 2), <span style="color:blue Me.DataGridView1.ColumnHeadersDefaultCellStyle.Font,
<span style="color:blue New SolidBrush(
j += 2
<p style="margin-bottom:0.0001pt; line-height:normal <span style="font-size:10pt; font-family:Courier New
<p style="margin-bottom:0.0001pt; line-height:normal 



<span style="color:blue End <span style="color:blue Sub
<p style="margin-bottom:0.0001pt; line-height:normal 
<span style="color:blue Private <span style="color:blue Sub DataGridView1_Scroll(<span style="color:blue ByVal sender
<span style="color:blue As <span style="color:blue Object, <span style="color:blue
ByVal e <span style="color:blue As System.Windows.Forms.ScrollEventArgs)

<span style="color:blue Dim rtHeader <span style="color:blue As Rectangle =

rtHeader.Height = 

<span style="color:blue End <span style="color:blue Sub

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Scrollable multiple column header in datagridview

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