Right click to select a row in a Datagridview and show a menu to delete it

Question

I have few columns in my DataGridView  and there is data in my rows  I saw few solutions in here  but I can not combine them   Simply a way to right-click on a row  it will select the whole row and show a menu with an option to delete the row and when the option selected it will delete the row   I made few attempts but none is working and it looks messy  What should I do

User · Answer

private void dgvOferty CellContextMenuStripNeeded object sender  DataGridViewCellContextMenuStripNeededEventArgs e                dgvOferty ClearSelection            int rowSelected   e RowIndex          if  e RowIndex    -1                        this dgvOferty Rows rowSelected  Selected   true                    e ContextMenuStrip   cmstrip          TADA  D  The easiest way period  For custom cells just modify a little

User · Answer

All the answers posed in to this question are based on a mouse click event  You can also assign a ContenxtMenuStrip to your DataGridview and check if there is a row selected when the user RightMouseButtons on the DataGridView and decide whether you want to view the ContenxtMenuStrip or not  You can do so by setting the CancelEventArgs Cancel value in the the Opening event of the ContextMenuStrip      private void MyContextMenuStrip Opening object sender  CancelEventArgs e                  Only show ContextMenuStrip when there is 1 row selected          if  MyDataGridView SelectedRows Count    1  e Cancel   true          But if you have several context menu strips  with each containing different options  depending on the selection  I would go for a mouse-click-approach myself as well

User · Answer

It s much more easier to add only the event for mousedown   private void MyDataGridView MouseDown object sender  MouseEventArgs e        if  e Button    MouseButtons Right                var hti   MyDataGridView HitTest e X  e Y           MyDataGridView Rows hti RowIndex  Selected   true          MyDataGridView Rows RemoveAt rowToDelete           MyDataGridView ClearSelection              This is easier  Of cource you have to init your mousedown-event as already mentioned with   this MyDataGridView MouseDown    new System Windows Forms MouseEventHandler this MyDataGridView MouseDown     in your constructor

User · Answer

private void dataGridView1 CellContextMenuStripNeeded object sender   DataGridViewCellContextMenuStripNeededEventArgs e                    if  e RowIndex    -1                dataGridView1 ClearSelection            this dataGridView1 Rows e RowIndex  Selected   true          e ContextMenuStrip   contextMenuStrip1

User · Answer

I have a new workaround to come in same result  but  with less code  for Winforms    That s example is in portuguese Follow up step by step   Create a contextMenuStrip in your form and create one item Sign one event click  OnCancelarItem Click  for this contextMenuStrip   Create a event  UserDeletingRow  on gridview  and now    you ve simulating on key press del from user          you don t forget to enable delete on the gridview  right           and finally

User · Answer

private void MyDataGridView MouseDown object sender  MouseEventArgs e        if e Button    MouseButtons Right                MyDataGridView ClearSelection            MyDataGridView Rows e RowIndex  Selected   true           private void DeleteRow Click object sender  EventArgs e        Int32 rowToDelete   MyrDataGridView Rows GetFirstRow DataGridViewElementStates Selected       MyDataGridView Rows RemoveAt rowToDelete       MyDataGridView ClearSelection

User · Answer

I finally solved it    In Visual Studio  create a ContextMenuStrip with an item called  DeleteRow  Then at the DataGridView link the ContextMenuStrip   Using the code below helped me getting it work   this MyDataGridView MouseDown    new System Windows Forms MouseEventHandler this MyDataGridView MouseDown   this DeleteRow Click    new System EventHandler this DeleteRow Click     Here is the cool part  private void MyDataGridView MouseDown object sender  MouseEventArgs e        if e Button    MouseButtons Right                var hti   MyDataGridView HitTest e X  e Y           MyDataGridView ClearSelection            MyDataGridView Rows hti RowIndex  Selected   true           private void DeleteRow Click object sender  EventArgs e        Int32 rowToDelete   MyDataGridView Rows GetFirstRow DataGridViewElementStates Selected       MyDataGridView Rows RemoveAt rowToDelete       MyDataGridView ClearSelection

User · Answer

It is work for me without any errors       this dataGridView2 MouseDown    new System Windows Forms MouseEventHandler this MyDataGridView MouseDown    this dataGridView2 Click    new System EventHandler this DeleteRow Click     And this  private void MyDataGridView MouseDown object sender  MouseEventArgs e        if  e Button    MouseButtons Right                var hti   dataGridView2 HitTest e X  e Y           dataGridView2 ClearSelection            dataGridView2 Rows hti RowIndex  Selected   true             private void DeleteRow Click object sender  EventArgs e        Int32 rowToDelete   dataGridView2 Rows GetFirstRow DataGridViewElementStates Selected       if  rowToDelete    -1          else                dataGridView2 Rows RemoveAt rowToDelete           dataGridView2 ClearSelection

User · Answer

You can also make this a little simpler by using the following inside the event code   private void MyDataGridView MouseDown object sender  MouseEventArgs e              if  e Button    MouseButtons Right                              rowToDelete   e RowIndex          MyDataGridView Rows RemoveAt rowToDelete                    MyDataGridView ClearSelection

User · Answer

base on  Data-Base answer it will not work until make selection mode FullRow    MyDataGridView SelectionMode   DataGridViewSelectionMode FullRowSelect    but if you need to make it work in CellSelect Mode   MyDataGridView SelectionMode   DataGridViewSelectionMode CellSelect       for cell selection  private void MyDataGridView MouseDown object sender  MouseEventArgs e       if e Button    MouseButtons Right               var hit   MyDataGridView HitTest e X  e Y          MyDataGridView ClearSelection               cell selection        MyDataGridView hit ColumnIndex hit RowIndex  Selected   true          private void DeleteRow Click object sender  EventArgs e       int rowToDelete   MyDataGridView Rows GetFirstRow DataGridViewElementStates Selected      MyDataGridView Rows RemoveAt rowToDelete      MyDataGridView ClearSelection

User · Answer

For completness of this question  better to use a Grid event rather than mouse   First Set your datagrid properties   SelectionMode to FullRowSelect and RowTemplate   ContextMenuStrip to a context menu   Create the CellMouseDown event -  private void myDatagridView CellMouseDown object sender  DataGridViewCellMouseEventArgs e        if  e Button    MouseButtons Right                int rowSelected   e RowIndex          if  e RowIndex    -1                        this myDatagridView ClearSelection                this myDatagridView Rows rowSelected  Selected   true                       you now have the selected row with the context menu showing for the user to delete etc

User · Answer

See here it can be done using the DataGridView RowTemplate property   Note  This code isn t tested but I ve used this method before      Create DataGridView DataGridView gridView   new DataGridView    gridView AutoGenerateColumns   false  gridView Columns Add  Col    Col        Create ContextMenu and set event ContextMenuStrip cMenu   new ContextMenuStrip    ToolStripItem mItem   cMenu Items Add  Delete    mItem Click     o  e    gt       Do Something                      This makes all rows added to the datagridview use the same context menu DataGridViewRow defaultRow   new DataGridViewRow    defaultRow ContextMenuStrip   cMenu    And there you go  as easy as that

[c#] Right click to select a row in a Datagridview and show a menu to delete it

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