我有2个datagridviews,我想将datagridview1中的单元格复制到datagridview2(一次一个单元格).我能够选择我想要的单元格并将其拖动到datagridview2但是值没有显示…
我大部分时间都在寻找解决方案…可能是一个简单的答案,或者我只需要睡觉,但请帮助….
我有以下代码
我大部分时间都在寻找解决方案…可能是一个简单的答案,或者我只需要睡觉,但请帮助….
我有以下代码
private void dataGridView1_MouseDown(object sender,MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
DataGridView.HitTestInfo info = dataGridView1.HitTest(e.X,e.Y);
if (info.RowIndex >= 0)
{
if (info.RowIndex >= 0 && info.ColumnIndex >= 0)
{
string text = (String)
dataGridView1.Rows[info.RowIndex].Cells[info.ColumnIndex].Value;
if (text != null)
dataGridView1.DoDragDrop(text,DragDropEffects.Copy);
}
}
}
}
private void dataGridView2_DragDrop(object sender,DragEventArgs e)
{
string cellvalue=e.Data.GetData(typeof(string)) as string;
Point cursorLocation=this.PointToClient(new Point(e.X,e.Y));
System.Windows.Forms.DataGridView.HitTestInfo hittest= dataGridView2.HitTest(cursorLocation.X,cursorLocation.Y);
if (hittest.ColumnIndex != -1
&& hittest.RowIndex != -1)
dataGridView2[hittest.ColumnIndex,hittest.RowIndex].Value = cellvalue;
}
private void dataGridView2_DragEnter(object sender,DragEventArgs e)
{
e.Effect = DragDropEffects.Copy;
}
而且我有设计师
// dataGridView1
//
this.dataGridView1.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize;
this.dataGridView1.Location = new System.Drawing.Point(12,12);
this.dataGridView1.Name = "dataGridView1";
this.dataGridView1.Size = new System.Drawing.Size(299,150);
this.dataGridView1.TabIndex = 0;
this.dataGridView1.MouseDown += new System.Windows.Forms.MouseEventHandler(this.dataGridView1_MouseDown);
//
// dataGridView2
//
this.dataGridView2.AllowDrop = true;
this.dataGridView2.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize;
this.dataGridView2.Columns.AddRange(new System.Windows.Forms.DataGridViewColumn[] {
this.Column1,this.Column2});
this.dataGridView2.Location = new System.Drawing.Point(353,141);
this.dataGridView2.Name = "dataGridView2";
this.dataGridView2.Size = new System.Drawing.Size(240,150);
this.dataGridView2.TabIndex = 5;
this.dataGridView2.DragDrop += new System.Windows.Forms.DragEventHandler(this.dataGridView2_DragDrop);
this.dataGridView2.DragEnter += new System.Windows.Forms.DragEventHandler(this.dataGridView2_DragEnter);
//
解决方法
您可以使用以下代码.我已经测试了它,它正在将单元数据从一个datagridview复制到另一个datagridview.
private void dataGridView2_DragEnter(object sender,DragEventArgs e)
{
e.Effect = DragDropEffects.Copy;
}
/* Drag & Drop */
private Rectangle dragBoxFromMouseDown;
private object valueFromMouseDown;
private void dataGridView1_MouseMove(object sender,MouseEventArgs e)
{
if ((e.Button & MouseButtons.Left) == MouseButtons.Left)
{
// If the mouse moves outside the rectangle,start the drag.
if (dragBoxFromMouseDown != Rectangle.Empty && !dragBoxFromMouseDown.Contains(e.X,e.Y))
{
// Proceed with the drag and drop,passing in the list item.
DragDropEffects dropEffect = dataGridView1.DoDragDrop(valueFromMouseDown,DragDropEffects.Copy);
}
}
}
private void dataGridView1_MouseDown(object sender,MouseEventArgs e)
{
// Get the index of the item the mouse is below.
var hittestInfo = dataGridView1.HitTest(e.X,e.Y);
if (hittestInfo.RowIndex != -1 && hittestInfo.ColumnIndex != -1)
{
valueFromMouseDown = dataGridView1.Rows[hittestInfo.RowIndex].Cells[hittestInfo.ColumnIndex].Value;
if (valueFromMouseDown != null)
{
// Remember the point where the mouse down occurred.
// The DragSize indicates the size that the mouse can move
// before a drag event should be started.
Size dragSize = SystemInformation.DragSize;
// Create a rectangle using the DragSize,with the mouse position being
// at the center of the rectangle.
dragBoxFromMouseDown = new Rectangle(new Point(e.X - (dragSize.Width / 2),e.Y - (dragSize.Height / 2)),dragSize);
}
}
else
// Reset the rectangle if the mouse is not over an item in the ListBox.
dragBoxFromMouseDown = Rectangle.Empty;
}
private void dataGridView2_DragOver(object sender,DragEventArgs e)
{
e.Effect = DragDropEffects.Copy;
}
private void dataGridView2_DragDrop(object sender,DragEventArgs e)
{
// The mouse locations are relative to the screen,so they must be
// converted to client coordinates.
Point clientPoint = dataGridView2.PointToClient(new Point(e.X,e.Y));
// If the drag operation was a copy then add the row to the other control.
if (e.Effect == DragDropEffects.Copy)
{
string cellvalue = e.Data.GetData(typeof(string)) as string;
var hittest = dataGridView2.HitTest(clientPoint.X,clientPoint.Y);
if (hittest.ColumnIndex != -1
&& hittest.RowIndex != -1)
dataGridView2[hittest.ColumnIndex,hittest.RowIndex].Value = cellvalue;
}
}
