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问题描述

我有一个 DataGridView的 DataGridViewComboBoxColumn 这势必会在列表< IBrand> ; 。在这个组合框中专栏中,我允许用户选择现有值,或键入一个新的。当用户选择一个现有值, IsCurrentRowDirty()正确返回true。当一个值的用户类型,在 IsCurrentRowDirty()总是返回false时,它显然不应该返回true。



我已经打过电话 DataGridView.CommitEdit() CurrentCellDirtyStateChanged 事件,但不工作



我如何在 DataGridViewComboBoxColumn 该行设置为脏?


$用户输入的值b $ b

相关代码如下:



谢谢,



凯尔

 公共无效BindBrands()
{
DataGridViewComboBoxColumn组合框=(DataGridViewComboBoxColumn)dgvReference.Columns [(INT)ReferenceColumnsIndex.Brand]

comboBox.DisplayMember =姓名;
comboBox.ValueMember =自我; //自我收益这个
comboBox.DataSource =品牌;
}


//这使得DataGridViewComboBoxColumn是由用户
私人无效dgvReference_EditingControlShowing(对象发件人,DataGridViewEditingControlShowingEventArgs E)
{$ B编辑$ b DataGridViewComboBoxColumn列= GetColumn< DataGridViewComboBoxColumn>(dgvReference,

(INT)ReferenceColumnsIndex.Brand);

如果(列!= NULL)
{
组合框下拉框中= e.Control作为组合框;
如果(组合框!= NULL)
{
comboBox.DropDownStyle = ComboBoxStyle.DropDown;
}
}
}

私人无效dgvReference_CellValidating(对象发件人,DataGridViewCellValidatingEventArgs E)
{
开关(e.ColumnIndex)
{
的情况下(INT)ReferenceColumnsIndex.Brand:

DataGridViewComboBoxColumn组合框= dgvReference.Columns [(INT)ReferenceColumnsIndex.Brand]作为DataGridViewComboBoxColumn;
如果(e.ColumnIndex == comboBox.DisplayIndex)
{
IBrand品牌=新的品牌(e.FormattedValue.ToString());
如果(!brands.Contains(品牌))
{
//如果品牌不存在,将其添加到组合框$ B $的数据源b brands.Add(品牌) ;
dgvReference.NotifyCurrentCellDirty(真); //< ==此行修复该问题

}

//当设置.value的在这里的品牌,IsCurrentRowDirty()没有返回true
dgvReference.Rows [e.RowIndex] .Cells [(INT)ReferenceColumnsIndex.Brand] .value的=品牌;
}

中断;
}
}


解决方案

好吧,我想通了,如何强制 IsCurrentRowDirty()方法返回真正。我需要添加以下代码行作为我的例子来说明:

  dgvReference.NotifyCurrentCellDirty(真); 

调用此对新进入的品牌将迫使该行的返回true IsCurrentRowDirty()方法。


I have a DataGridView with a DataGridViewComboBoxColumn which is bound to a List<IBrand>. In this combo box column, I allow the user to either select an existing value or type in a new one. When a user selects an existing value, IsCurrentRowDirty() correctly returns true. When the user types in a value, the IsCurrentRowDirty() always returns false when it obviously should return true.

I've tried calling DataGridView.CommitEdit() in the CurrentCellDirtyStateChanged event but that does not work

How do I get a user entered value in a DataGridViewComboBoxColumn to set the row to dirty?

Relevant code follows.

Thanks,

Kyle

        public void BindBrands()
        {
            DataGridViewComboBoxColumn comboBox = (DataGridViewComboBoxColumn)dgvReference.Columns[(int)ReferenceColumnsIndex.Brand];

            comboBox.DisplayMember = "Name";
            comboBox.ValueMember = "Self"; //"Self" returns "this"
            comboBox.DataSource = brands;
        }


            //This enables the DataGridViewComboBoxColumn to be editable by the user
            private void dgvReference_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
            {
                DataGridViewComboBoxColumn column = GetColumn<DataGridViewComboBoxColumn>(dgvReference,

                (int) ReferenceColumnsIndex.Brand);

            if (column != null)
            {
                ComboBox comboBox = e.Control as ComboBox;
                if (comboBox != null)
                {
                    comboBox.DropDownStyle = ComboBoxStyle.DropDown;
                }
            }
        }

        private void dgvReference_CellValidating(object sender, DataGridViewCellValidatingEventArgs e)
        {
            switch (e.ColumnIndex)
            {
                case (int)ReferenceColumnsIndex.Brand:

                    DataGridViewComboBoxColumn comboBox = dgvReference.Columns[(int)ReferenceColumnsIndex.Brand] as DataGridViewComboBoxColumn;
                    if (e.ColumnIndex == comboBox.DisplayIndex)
                    {
                        IBrand brand = new Brand(e.FormattedValue.ToString());
                        if (!brands.Contains(brand))
                        {
                            //If the brand does not exist, add it to the datasource of the combobox
                            brands.Add(brand);
                            dgvReference.NotifyCurrentCellDirty(true); //<== THIS LINE FIXES THE ISSUE

                        }

                        //When setting the .Value to brand here, IsCurrentRowDirty() does not return true
                        dgvReference.Rows[e.RowIndex].Cells[(int)ReferenceColumnsIndex.Brand].Value = brand;
                    }

                    break;
    }
}
解决方案

Okay, I figured out how to force the IsCurrentRowDirty() method to return true. I needed to add the following line of code as illustrated in my example:

dgvReference.NotifyCurrentCellDirty(true);

Calling this on a newly entered brand will force the row to return true for IsCurrentRowDirty() method.

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10-29 02:05