datagridview中自写的textbox问题

Question

我的datagridview中有那么一列
因为我绑定了数据库，而且字段属性是datetime，所以在datagridview中修改这一列的单元格，是一件很头疼的事情。
我自写了一个textbox，光标定位到这一列的单元格时，就显示textbox，将值放在textbox中修改，然后定义textbox_Leave事件，textbox内容将转成日期格式后赋给CurrentCell
问题是，当我在textbox中写入“2013”，写到“0”时，光标没有动过，就触发Leave事件啊。
清空textbox，首次写入时候会出现这个问题，再次写入时候，就能将“2013”全部写完，才触发Leave事件。
对于这个问题，谁遇到过，能否给点意见。我试过，把textbox直接放在页面上，没有问题，但是放在datagridview里面，就会出现以上问题了。datagridviewtextbox

Answer 1

其实你应该自定义列的类型，定义一个datetime类型的列，那样方便    public class DateTimeCell : DataGridViewTextBoxCell
    {
        private DateTimeEdit dtEdit;
        public DateTimeCell()
        {
            //this.Value = "";
        }
        public override void InitializeEditingControl(int rowIndex, object initialFormattedValue, DataGridViewCellStyle dataGridViewCellStyle)
        {
            base.InitializeEditingControl(rowIndex, initialFormattedValue, dataGridViewCellStyle);
            this.dtEdit = DataGridView.EditingControl as DateTimeEdit;
            if (this.Value == null)
            {
                this.dtEdit.Value = (DateTime)this.DefaultNewRowValue;
            }
            else
            {
                this.dtEdit.Value = Convert.ToDateTime(this.Value);
            }
            //this.dtEdit.Value = Convert.ToDateTime(this.Value);
            //if (this.dtEdit != null)
            //{
            //    this.dtEdit.Format = DateTimePickerFormat.Custom;
            //    this.dtEdit.CustomFormat = dataGridViewCellStyle.Format;
            //    //this.dtEdit.ShowUpDown = ((DateTimeColumn)this.OwningColumn).ShowUpDown;
            //}
        }
        public override Type EditType
        {
            get
            {
                return typeof(DateTimeEdit);
            }
        }        public override Type ValueType
        {
            get
            {
                return typeof(DateTime);
            }
        }        protected override object GetValue(int rowIndex)
        {
            return Convert.ToDateTime(base.GetValue(rowIndex)).ToShortDateString();
        }        public override object DefaultNewRowValue
        {
            get
            {
                return DateTime.Now;
            }
        }
        public override object ParseFormattedValue(object formattedValue, DataGridViewCellStyle cellStyle, System.ComponentModel.TypeConverter formattedValueTypeConverter, System.ComponentModel.TypeConverter valueTypeConverter)
        {
            return base.ParseFormattedValue(formattedValue.ToString(), cellStyle, formattedValueTypeConverter, valueTypeConverter);
        }
    }    public class DateTimeColumn : DataGridViewColumn
    {
        public DateTimeColumn() : base(new DateTimeCell()) { }
        public override DataGridViewCell CellTemplate
        {
            get
            {
                return base.CellTemplate;
            }
            set
            {
                if (value != null && !value.GetType().IsAssignableFrom(typeof(DateTimeCell)))
                    base.CellTemplate.Value = DateTime.Now.ToShortDateString();
                base.CellTemplate = value;
            }
        }
    }    public class DateTimeEdit : DateTimePicker, IDataGridViewEditingControl
    {
        private DataGridView gridview;
        private bool valuechanged = false;
        int rowindex;
        public void ApplyCellStyleToEditingControl(DataGridViewCellStyle dataGridViewCellStyle)
        {
            this.Font = dataGridViewCellStyle.Font;
            this.ForeColor = dataGridViewCellStyle.ForeColor;
            this.BackColor = dataGridViewCellStyle.BackColor;
        }
        public DataGridView EditingControlDataGridView
        {
            get
            {
                return gridview;
            }
            set
            {
                gridview = value;
            }
        }        public object EditingControlFormattedValue
        {
            get
            {
                return this.Value.ToShortDateString();
            }
            set
            {
                if (value != null)
                    this.Value = Convert.ToDateTime(value);
            }
        }        public int EditingControlRowIndex
        {
            get
            {
                return rowindex;
            }
            set
            {
                rowindex = value;
            }
        }        public bool EditingControlValueChanged
        {
            get
            {
                return valuechanged;
            }
            set
            {
                valuechanged = value;
            }
        }
        public bool EditingControlWantsInputKey(Keys keyData, bool dataGridViewWantsInputKey)
        {
            switch (keyData & Keys.KeyCode)
            {
                case Keys.Left:
                case Keys.Up:
                case Keys.Down:
                case Keys.Right:
                case Keys.Home:
                case Keys.End:
                case Keys.PageDown:
                case Keys.PageUp:
                    return true;
                default:
                    return false;
            }
        }
        public Cursor EditingPanelCursor
        {
            get { return base.Cursor; }
        }        public object GetEditingControlFormattedValue(DataGridViewDataErrorContexts context)
        {
            return EditingControlFormattedValue;
        }        public void PrepareEditingControlForEdit(bool selectAll)
        {        }        public bool RepositionEditingControlOnValueChange
        {
            get { return false; }
        }
        protected override void OnValueChanged(EventArgs eventargs)
        {
            valuechanged = true;
            this.EditingControlDataGridView.NotifyCurrentCellDirty(true);
            base.OnValueChanged(eventargs);
        }
    }