i have DataGridView with several columns, every Row represent my object with several properties like name, id etc.
after change my Name column Checkbox i want to update my object
How can i get my column Checknox state ?
This is what i have try:
private void dataGridView1_CurrentCellDirtyStateChanged(object sender, EventArgs e)
{
if (dataGridView1.IsCurrentCellDirty)
{
dataGridView1.CommitEdit(DataGridViewDataErrorContexts.Commit);
}
}
private void dataGridView1_CellValueChanged(object sender, DataGridViewCellEventArgs e)
{
if (dataGridView1.Columns[e.ColumnIndex].Name == "Name")
{
}
}
I assume Name is the name of DataGridViewCheckBoxColumn
private void dataGridView1_CellValueChanged(object sender, DataGridViewCellEventArgs e)
{
if (dataGridView1.Columns[e.ColumnIndex].Name == "Name")
{
var isChecked = dataGridView1[e.ColumnIndex, e.RowIndex].Value as bool? ?? false;
//rest of logic
}
}
this is the simplest and safest way.
To iterate through all cells in row use this code:
DataGridViewRow row = dataGridView1.Rows[e.RowIndex];
foreach (DataGridViewCell cell in row.Cells)
{
object value = cell.Value;
}
Maybe you can use the FindControl() to get the state of checkbox:
CheckBox cbName = (CheckBox)dataGridView1.Columns[e.ColumnIndex].FindControl("cbName");
checkState = cbName.CheckState.toString();
or
isChecked = cbName.Checked;
Related
So far I managed to handle the event when the value of the comboBox is changed, but when I want to update the content of another cell with that value I'm receiving a 'System.NullReferenceException'.
This is the code I'm using to handle the event (I found it in another question)
void dataGridView1_CurrentCellDirtyStateChanged(object sender, EventArgs e)
{
if (this.dataGridBebidas.IsCurrentCellDirty)
{
// This fires the cell value changed handler below
dataGridBebidas.CommitEdit(DataGridViewDataErrorContexts.Commit);
}
}
private void dataGridView1_CellValueChanged(object sender, DataGridViewCellEventArgs e)
{
// My combobox column is the second one so I hard coded a 1, flavor to taste
DataGridViewComboBoxCell cb = (DataGridViewComboBoxCell)dataGridBebidas.Rows[e.RowIndex].Cells[4];
if (cb.Value != null)
{
// Asigno valor de combobox a campo "Alcohol"
dataGridBebidas.Invalidate();
var currentcell = dataGridBebidas.CurrentCellAddress;
var sendingCB = sender as DataGridViewComboBoxEditingControl;
DataGridViewTextBoxCell cel = (DataGridViewTextBoxCell)dataGridBebidas.Rows[currentcell.Y].Cells[3]; // Cell I want to update
cel.Value = sendingCB.EditingControlFormattedValue.ToString(); // Asign value of the combobox
}
}
What am I missing?
I hope it is what you want.
void dataGridView1_CurrentCellDirtyStateChanged(object sender, EventArgs e)
{
if (this.dataGridBebidas.IsCurrentCellDirty)
{
// This fires the cell value changed handler below
dataGridBebidas.CommitEdit(DataGridViewDataErrorContexts.Commit);
}
}
private void dataGridView1_CellValueChanged(object sender, DataGridViewCellEventArgs e)
{
// My combobox column is the second one so I hard coded a 1, flavor to taste
DataGridViewComboBoxCell cb = (DataGridViewComboBoxCell)dataGridBebidas.Rows[e.RowIndex].Cells[4];
if (cb.Value != null)
{
// Asigno valor de combobox a campo "Alcohol"
dataGridBebidas.Invalidate();
dataGridBebidas.Rows[e.RowIndex].Cells[3].Value = cb.Value; // Cell I want to update
}
}
I have button inside DataGrid (created by Edit Column), and TextBox same. I have created CellClick event on button. Now I want TextBox value which will be enter by user.
How can I get it?
I've tried
private void dataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)
{
if (e.ColumnIndex == 0)
{
//Here i will get cell value which bind from database
dataGridView1.Rows[e.RowIndex].Cells[1].Value.ToString();
}
}
try this
form load:
private void Form1_Load(object sender, EventArgs e)
{
dataGridView1.SelectionMode = DataGridViewSelectionMode.FullRowSelect;
}
CellClick Event:
private void dataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)
{
DataGridViewRow row = new DataGridViewRow();
row = dataGridView1.SelectedRows[0];
if (row.Cells[0].Value!=null && row.Cells[1].Value != null && row.Cells[2].Value != null) {
textBox1.Text = row.Cells[0].Value.ToString();
textBox2.Text = row.Cells[1].Value.ToString();
textBox3.Text = row.Cells[2].Value.ToString();
}
}
I have used the CellContentClick and it works perfectly. I've also added a string variable that takes the value. This is my code:
private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
{
if (e.ColumnIndex == 0)
{
string value = dataGridView1.Rows[e.RowIndex].Cells[1].Value.ToString();
MessageBox.Show(value);
}
}
Hi i have a datagrid in window form called "dataGridView1" and i have combobox in the dataGridView1; i am displaying the data in combobox from database and all data loads in that combobox when window loads. i have function LoadModels for that. there is one column ModelName which i want to display and in valuemember there will be MedelID, so i want when user select any model from combobox then it give me id of that model called "ModelID".
public frmBikeOrder()
{
InitializeComponent();
StartPosition = FormStartPosition.CenterScreen;
FormBorderStyle = FormBorderStyle.FixedSingle;
ControlBox = false;
LoadModels();
}
private void LoadModels()
{
RST_DBDataContext conn = new RST_DBDataContext();
List<TblBikeModel> AllModels = (from s in conn.TblBikeModels
select s).ToList();
Column2.DataSource = AllModels;
Column2.DisplayMember = "ModelName";
Column2.ValueMember = "ModelID";
}
i have a function when value changes, i want the value in messagebox after combobox value change
private void dataGridView1_CellValueChanged(object sender, DataGridViewCellEventArgs e)
{
if (e.ColumnIndex == 1)
{
ComboBox cmb = ComboBox();
MessageBox.Show(cmb.SelectedValue.ToString());
}
}
use this
private void dataGridView1_CellValueChanged(object sender, DataGridViewCellEventArgs e)
{
if (e.ColumnIndex == 1)
{
bool val = (bool)dataGridView1.SelectedCells[0].Value;
MessageBox.Show(val.ToString());
}
}
you get the selected cell using dataGridView1.SelectedCells[0] and it's value(is checked) with the value Property.
you can also use the DataGridViewCellEventArgs and do:
private void dataGridView1_CellValueChanged(object sender, DataGridViewCellEventArgs e)
{
if (e.ColumnIndex == 1)
{
bool val = (bool)dataGridView1[e.ColumnIndex, e.RowIndex].Value;
MessageBox.Show(val.ToString());
}
}
Set the property of combobox as:
ModelComboBox.SelectedValuePath = "ModelID";
ModelComboBox.DisplayMemberPath = "ModelName";
Then ModelComboBox.SelectedValue will be ModelID.
I have a DataGridView, I want to select the cell of the first column.
Heres is my datagridview.Click method:
private void dataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)
{
name = dataGridView1.CurrentRow.Cells[0].Value.ToString();
}
Currently my name variable is null.
What am I doing wrong?
CurrentRow may not be set yet, so use the RowIndex property for the event argument. Try it this way:
void dataGridView1_CellClick(object sender, DataGridViewCellEventArgs e) {
if (e.RowIndex > -1 && dataGridView1.Rows[e.RowIndex].Cells[0].Value != null) {
name = dataGridView1.Rows[e.RowIndex].Cells[0].Value.ToString();
}
}
And just in case, make sure the event is wired up:
public Form1() {
InitializeComponent();
dataGridView1.CellClick += dataGridView1_CellClick;
}
You could do this:
private void dataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)
{
var view = (sender as DataGridView); //<-- notes this
var currentCellString = view.CurrentCell.Value.ToString();
}
Sometimes you need to grab the sender object at use that - because it will always be updated.
private void dataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)
{
object name = dataGridView1.Rows[e.RowIndex].Cells[0].Value;
MessageBox.Show(name.ToString() == string.Empty ? "myvalue" : name.ToString());
}
I am trying to enter values in a datagridview Combobox. but it does not Allows. What to do?
private void GridStockItemEntry_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
{
DataGridViewRow row = GridStockItemEntry.CurrentRow;
DataGridViewCell cell = GridStockItemEntry.CurrentCell;
if (e.Control.GetType() == typeof(DataGridViewComboBoxEditingControl))
{
if (cell == row.Cells["ItemName"] && Convert.ToString(row.Cells["Type"].Value) == "Raw Material")
{
DataGridViewComboBoxEditingControl cbo = e.Control as DataGridViewComboBoxEditingControl;
cbo.DropDownStyle = ComboBoxStyle.DropDown;
cbo.Validating += new CancelEventHandler(cbo_Validating);
}
}
}
void cbo_Validating(object sender, CancelEventArgs e)
{
DataGridViewComboBoxEditingControl cbo = sender as DataGridViewComboBoxEditingControl;
DataGridView grid = cbo.EditingControlDataGridView;
object value = cbo.Text;
// Add value to list if not there
if (cbo.Items.IndexOf(value) == -1)
{
DataGridViewComboBoxCell cboCol = (DataGridViewComboBoxCell)grid.CurrentCell;
// Must add to both the current combobox as well as the template, to avoid duplicate entries...
cbo.Items.Add(value);
cboCol.Items.Add(value);
grid.CurrentCell.Value = value;
}
}
Maybe, this example is better readable:
private void datagridview_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e) {
DataGridView dgv = (DataGridView)sender;
if(dgv.CurrentCell.ColumnIndex==dgv.Columns["ColumnName"].Index) {
ComboBox cbx = (ComboBox)e.Control;
cbx.DropDownStyle = ComboBoxStyle.DropDown;
cbx.AutoCompleteSource = AutoCompleteSource.ListItems;
cbx.AutoCompleteMode = System.Windows.Forms.AutoCompleteMode.Suggest;
}
}
Make sure that EditMode property of the DataGridView is set to EditOnKeystrokeOrF2
Also, verify that ReadOnly property is set to False.