DataGridView checkbox column - value and functionality

Question

I ve added a checkbox column to a DataGridView in my C  form  The function needs to be dynamic - you select a customer and that brings up all of their items that could be serviced  and you select which of them you wish to be serviced this time around   Anyway  the code will now add a chckbox to the beginning of the DGV  What I need to know is the following   1  How do I make it so that the whole column is  checked  by default  2  How can I make sure I m only getting values from the  checked  rows when I click on a button just below the DGV   Here s the code to get the column inserted   DataGridViewCheckBoxColumn doWork   new DataGridViewCheckBoxColumn                doWork HeaderText    Include Dog               doWork FalseValue    0               doWork TrueValue    1               dataGridView1 Columns Insert 0  doWork     So what next  Any help would be greatly appreciated

User · Answer

1  How do I make it so that the whole column is  checked  by default   var doWork   new DataGridViewCheckBoxColumn    doWork Name    IncludeDog    Added so you can find the column in a row doWork HeaderText    Include Dog   doWork FalseValue    0   doWork TrueValue    1      Make the default checked doWork CellTemplate Value   true  doWork CellTemplate Style NullValue   true   dataGridView1 Columns Insert 0  doWork     2  How can I make sure I m only getting values from the  checked  rows   foreach  DataGridViewRow row in dataGridView1 Rows        if  row IsNewRow  continue   If editing is enabled  skip the new row        The Cell s Value gets it wrong with the true default  it will return                false until the cell changes so use FormattedValue instead      if  Convert ToBoolean row Cells  IncludeDog   FormattedValue                   Do stuff with row

User · Answer

it took me a long time to figure out how to do this without having to loop through all the records  I have a bound datagridview-source  and all fields are bound except for the checkbox-column  So I don t have need a loop to add each row and I didn t want to create one just for this purpuse  So after a lot of trying I finally got it  And it s actually very simple too   First you add a new  cs File to your project with a custom-checkbox cell  e g    DataGridViewCheckboxCellFilter cs   using System Windows Forms   namespace MyNamespace       public class DataGridViewCheckboxCellFilter   DataGridViewCheckBoxCell           public DataGridViewCheckboxCellFilter     base                 this FalseValue   0              this TrueValue   1              this Value   TrueValue                      After this  on your GridView  where you add the checkbox-column  you do      add checkboxes DataGridViewCheckBoxColumn col chkbox   new DataGridViewCheckBoxColumn          col chkbox HeaderText    X       col chkbox Name    checked       col chkbox CellTemplate   new DataGridViewCheckboxCellFilter                      this Columns Add col chkbox     And that s it  Everytime your checkboxes get added in a new row  they ll be set to true  Enjoy

User · Answer

If you have a gridview containing more than one checkbox      you should try this       Object   o new Object 6    for  int i   0  i  lt  dgverlist RowCount  i          for  int j   2  j  lt  dgverlist ColumnCount  j                  DataGridViewCheckBoxCell ch1   new DataGridViewCheckBoxCell            ch1    DataGridViewCheckBoxCell dgverlist Rows i  Cells j            if  ch1 Value    null                       o i    ch1 OwningColumn HeaderText ToString                 MessageBox Show o i  ToString

User · Answer

There is no way to do that directly   Once you have your data in the grid  you can loop through the rows and check each box like this   foreach  DataGridViewRow row in dataGridView1 Rows        row Cells CheckBoxColumn1 Name  Value   true     The Click event might look something like this   private void button1 Click object sender  EventArgs e        List lt DataGridViewRow gt  rows with checked column   new List lt DataGridViewRow gt         foreach  DataGridViewRow row in dataGridView1 Rows                if  Convert ToBoolean row Cells CheckBoxColumn1 Name  Value     true                        rows with checked column Add row                          Do what you want with the check rows

User · Answer

To test if the column is checked or not   for  int i   0  i  lt  dgvName Rows Count  i          if   bool dgvName Rows i  Cells 8  Value               Column is checked

User · Answer

If your column has been already created due to binding with a recordset of BIT type  the type of the column will be text anyway  The solution I have found is to remove that column and replace it with a DataGridViewCheckBoxColumn having the same binding data  DataGridViewColumn oldCol   dgViewCategory Columns  quot mycolumn quot    int chkIdx   oldCol Index  DataGridViewCheckBoxColumn chkCol   new DataGridViewCheckBoxColumn    chkCol HeaderText   oldCol HeaderText  chkCol FalseValue    quot False quot   chkCol TrueValue    quot True quot   chkCol DataPropertyName   oldCol DataPropertyName  chkCol Name   oldCol Name  dgViewCategory Columns RemoveAt chkIdx   dgViewCategory Columns Insert chkIdx  chkCol

User · Answer

if u make this column in sql database  bit  as a data type u should edit this code DataGridViewCheckBoxColumn doWork   new DataGridViewCheckBoxColumn    doWork HeaderText    quot Include Dog quot   doWork FalseValue    quot 0 quot   doWork TrueValue    quot 1 quot   dataGridView1 Columns Insert 0  doWork    with this DataGridViewCheckBoxColumn doWork   new DataGridViewCheckBoxColumn    doWork HeaderText    quot Include Dog quot   doWork FalseValue    quot False quot   doWork TrueValue    quot True quot   dataGridView1 Columns Insert 0  doWork

User · Answer

It is quite simple DataGridViewCheckBoxCell checkedCell    DataGridViewCheckBoxCell  grdData Rows e RowIndex  Cells  quot grdChkEnable quot         bool isEnabled   false  if  checkedCell AccessibilityObject State HasFlag AccessibleStates Checked         isEnabled   true    if  isEnabled          do your business process

User · Answer

If you try it on CellContentClick Event  Use   dataGridView1 EndEdit       Stop editing of cell  MessageBox Show  0       dataGridView1 Rows e RowIndex  Cells 0  Value ToString

User · Answer

Here s a one liner answer for this question  List lt DataGridViewRow gt  list   DataGridView1 Rows Cast lt DataGridViewRow gt    Where k   gt  Convert ToBoolean k Cells CheckBoxColumn1 Name  Value     true  ToList

User · Answer

private void dataGridView1 CellContentClick object sender  DataGridViewCellEventArgs e        DataGridViewCheckBoxCell ch1   new DataGridViewCheckBoxCell        ch1    DataGridViewCheckBoxCell dataGridView1 Rows dataGridView1 CurrentRow Index  Cells 0        if  ch1 Value    null          ch1 Value false      switch  ch1 Value ToString                  case  True               ch1 Value   false              break          case  False               ch1 Value   true              break            MessageBox Show ch1 Value ToString         best solution to find if the checkbox in the datagridview is checked or not

[c#] DataGridView checkbox column - value and functionality

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