c# - 列で1つのチェックボックスのみを選択することを強制するDatagridview

Question

Datagridview の列で 1 つのチェックボックスのみを強制的にチェックするにはどうすればよいですか?

Answer 1

 private void grdRegClass_CellContentClick(object sender, DataGridViewCellEventArgs e)
    {
        if (grdRegClass.Columns.IndexOf(grdRegClass.Columns["Status"]) == e.ColumnIndex)
        {
            int currentcolumnclicked = e.ColumnIndex;
            int currentrowclicked = e.RowIndex;
            foreach (DataGridViewRow dr in grdRegClass.Rows)
            {
                dr.Cells[currentcolumnclicked].Value = false;
            }
            grdRegClass.CurrentRow.Cells[currentrowclicked].Value = true;  
        }
    }

Answer 2

グリッドのイベントをサブスクライブしCellValueChanged、現在のセルのチェック状態に応じて、DataGridView をループし、他のセルの値として true/false を設定する必要があります。

void grd_CellValueChanged(object sender, DataGridViewCellEventArgs e)
{
      if ((sender as DataGridView).CurrentCell is DataGridViewCheckBoxCell)
      {
           if (Convert.ToBoolean(((sender as DataGridView).CurrentCell as DataGridViewCheckBoxCell).Value))
           {
                   // Maybe have a method which does the
                    //loop and set value except for the current cell
            }
        }
}

Answer 3

    private void dataGridViewProduit_CellValueChanged(object sender, DataGridViewCellEventArgs e)
    {
        if ((sender as DataGridView).CurrentCell is DataGridViewCheckBoxCell)
        {
            if (Convert.ToBoolean(((sender as DataGridView).CurrentCell as DataGridViewCheckBoxCell).Value))
            {
                foreach (DataGridViewRow row in (sender as DataGridView).Rows)
                {
                    if (row.Index != (sender as DataGridView).CurrentCell.RowIndex && Convert.ToBoolean(row.Cells[e.ColumnIndex].Value) == true)
                    {
                        row.Cells[e.ColumnIndex].Value = false;
                    }
                }
            }
        }
    }

    private void dataGridViewClient_CurrentCellDirtyStateChanged(object sender, EventArgs e)
    {
        if (this.dataGridViewClient.IsCurrentCellDirty)
        {
            dataGridViewClient.CommitEdit(DataGridViewDataErrorContexts.Commit);
        }
    }

Answer 4

vb.netで：

Private Sub DataGridViewJobsList_CellValueChanged(sender As Object, e As DataGridViewCellEventArgs) Handles DataGridViewJobsList.CellValueChanged
    If TypeOf TryCast(sender, DataGridView).CurrentCell Is DataGridViewCheckBoxCell Then
        Dim cell1 As DataGridViewCell
        cell1 = TryCast(sender, DataGridView).CurrentCell
        If cell1.Value = True Then
            For Each row As DataGridViewRow In TryCast(sender, DataGridView).Rows
                If row.Index <> cell1.RowIndex AndAlso row.Cells(e.ColumnIndex).Value = "1" Then
                    row.Cells(e.ColumnIndex).Value = False
                End If
            Next
        End If
    End If
End Sub

Private Sub DataGridViewJobsList_CurrentCellDirtyStateChanged(sender As Object, e As EventArgs) Handles DataGridViewJobsList.CurrentCellDirtyStateChanged
    If Me.DataGridViewJobsList.IsCurrentCellDirty Then
        DataGridViewJobsList.CommitEdit(DataGridViewDataErrorContexts.Commit)
    End If
End Sub

Answer 5

セルが変更された後に発生するため、CellEndEditのイベントを使用できます。DGV以下のコードを使用するには、以下のコード スニペットのコメントをお読みください。

private void dgrvUserProfileView_CellEndEdit(object sender, DataGridViewCellEventArgs e)
{
    int CheckedCount = 0;

    //Make sure you have set True Value/ false Value property of check box column to 1/0 or true/false resp.
    //Lets say your column 5th(namely Department) is a checked box column
    if (dgrvUserProfileView.Columns[e.ColumnIndex].Name == "Department")
    {
        for (int i = 0; i <= dgrvUserProfileView.Rows.Count - 1; i++)
        {
            if (Convert.ToBoolean(dgrvUserProfileView.Rows[i].Cells["Department"].Value) == true)
            {
                CheckedCount = CheckedCount + 1;
            }
        }

        if (CheckedCount == 1)
        {
            for (int i = 0; i <= dgrvUserProfileView.Rows.Count - 1; i++)
            {
                if (Convert.ToBoolean(dgrvUserProfileView.Rows[i].Cells["Department"].Value) == true)
                {
                    dgrvUserProfileView.Rows[i].Cells["Department"].ReadOnly = true;
                }
            }
        }
        else
        {
            for (int i = 0; i <= dgrvUserProfileView.Rows.Count - 1; i++)
            {
                dgrvUserProfileView.Rows[i].Cells["Department"].ReadOnly = false;
            }
        }
    }
}

お役に立てれば！

Answer 6

列を気にせずに失敗しないように、次のことを試してください。

private void DgvIVA_CellContentClick(object sender, DataGridViewCellEventArgs e)
{
    DataGridView dg = (DataGridView)sender;
    if (dg.Rows.Count == 0) return;
    if (dg.Rows[e.RowIndex].Cells[e.ColumnIndex].GetType() == typeof(DataGridViewCheckBoxCell))
    {
        int rowSelIndex = e.RowIndex;
        foreach (DataGridViewRow row in dg.Rows)
        {
            if (row.Index != rowSelIndex)
            {
                row.Cells[e.ColumnIndex].Value = false;
            }
        }
    }
}

Answer 7

private void dgvlist_CellContentClick(object sender, DataGridViewCellEventArgs e)  
    {  
        int currentcolumnclicked = e.ColumnIndex;  
        for (int i = 0; i <= dgvlist.Columns.Count - 1; i++)  
        {  
            if (dgvlist.Columns[i] is DataGridViewCheckBoxColumn)  
            {  
                if (Convert.ToString(dgvlist.CurrentRow.Cells[i].EditedFormattedValue) == "True" && i !=currentcolumnclicked)  
                {  
                    dgvlist.CurrentRow.Cells[i].Value = false;  
                }  
            }  
        }  
    }  

Answer 8

private void dataGridView3_CellContentClick(object sender, DataGridViewCellEventArgs e)
        {
            if (e.ColumnIndex == 1)
            {
                try
                {
                    string val = dataGridView3.Rows[e.RowIndex].Cells[e.ColumnIndex].Value.ToString();
                    if (val == "False")
                        val = "True";
                    else if (val == "True")
                        val = "False";
                    dataGridView3.Rows[e.RowIndex].Cells[e.ColumnIndex].Value = val;

                for (int i = 0; i < dataGridView3.Rows.Count; i++)
                {
                    string active = "";
                    if (i != e.RowIndex)
                    {
                        if (val == "False")
                        {
                            dataGridView3.Rows[i].Cells[1].Value = "True";
                            active = "Y";
                        }
                        else if (val == "True")
                        {
                            dataGridView3.Rows[i].Cells[1].Value = "False";
                            active = "N";
                        }
                    }
                    else
                    {
                        if (val == "False")
                            active = "N";
                        else
                            active = "Y";
                    }




                }


            }
            catch (Exception ex)
            { }
        }
    }