How to deselect all selected rows in a DataGridView control

Question

I d like to deselect all selected rows in a DataGridView control when the user clicks on a blank  non-row  part of the control  How can I do this

User · Answer

Thanks Cody heres the c  for ref   if  e Button    System Windows Forms MouseButtons Left                        DataGridView HitTestInfo hit   dgv track HitTest e X  e Y               if  hit Type    DataGridViewHitTestType None                                dgv track ClearSelection                    dgv track CurrentCell   null

User · Answer

Set  dgv CurrentCell   null    when user clicks on a blank part of the dgv

User · Answer

In VB net use for the Sub       Private Sub dgv MouseUp ByVal sender As Object  ByVal e As System Windows Forms MouseEventArgs  Handles dgv MouseUp       deselezionare se click su vuoto     If e Button   MouseButtons Left Then           Check the HitTest information for this click location         If Equals dgv HitTest e X  e Y   DataGridView HitTestInfo Nowhere  Then             dgv ClearSelection               dgv CurrentCell   Nothing         End If     End If End Sub

User · Answer

To deselect all rows and cells in a DataGridView  you can use the ClearSelection method   myDataGridView ClearSelection     If you don t want even the first row cell to appear selected  you can set the CurrentCell property to Nothing null  which will temporarily hide the focus rectangle until the control receives focus again   myDataGridView CurrentCell   Nothing   To determine when the user has clicked on a blank part of the DataGridView  you re going to have to handle its MouseUp event  In that event  you can HitTest the click location and watch for this to indicate HitTestInfo Nowhere  For example   Private Sub myDataGridView MouseUp ByVal sender as Object  ByVal e as System Windows Forms MouseEventArgs          See if the left mouse button was clicked     If e Button   MouseButtons Left Then             Check the HitTest information for this click location         If myDataGridView HitTest e X  e Y    DataGridView HitTestInfo Nowhere Then             myDataGridView ClearSelection               myDataGridView CurrentCell   Nothing         End If     End If End Sub   Of course  you could also subclass the existing DataGridView control to combine all of this functionality into a single custom control  You ll need to override its OnMouseUp method similar to the way shown above  I also like to provide a public DeselectAll method for convenience that both calls the ClearSelection method and sets the CurrentCell property to Nothing    Code samples are all arbitrarily in VB NET because the question doesn t specify a language   apologies if this is not your native dialect

User · Answer

i have ran into the same problem and found a solution  not totally by myself  but there is the internet for   Color blue    ColorTranslator FromHtml   CCFFFF    Color red   ColorTranslator FromHtml   FFCCFF    Color letters   Color Black   foreach  DataGridViewRow r in datagridIncome Rows        if  r Cells 5  Value ToString   Contains  1               r DefaultCellStyle BackColor   blue          r DefaultCellStyle SelectionBackColor   blue          r DefaultCellStyle SelectionForeColor   letters            else            r DefaultCellStyle BackColor   red          r DefaultCellStyle SelectionBackColor   red          r DefaultCellStyle SelectionForeColor   letters            This is a small trick  the only way you can see a row is selected  is by the very first column  not column 0   but the one therefore   When you click another row  you will not see the blue selection anymore  only the arrow indicates which row have selected  As you understand  I use rowSelection in my gridview

User · Answer

i found out why my first row was default selected and found out how to not select it by default   By default my datagridview was the object with the first tab-stop on my windows form  Making the tab stop first on another object  maybe disabling tabstop for the datagrid at all will work to  disabled selecting the first row

[.net] How to deselect all selected rows in a DataGridView control?

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