求助c# 类中定义方法不能返回数据
代码如下:
public void GetExcelData()
{
OpenFileDialog _dialog1 = new OpenFileDialog();
_dialog1.Filter = "Excel文件(*.xls,*.xlsx)|*.xls;*.xlsx";
if (_dialog1.ShowDialog() == DialogResult.OK)
{
string _fileName = _dialog1.FileName.ToString();
if (_fileName == null || _fileName == "")
return;
OldDB_GetExcelData _GetExcelTable = new OldDB_GetExcelData(_fileName);
DataTable dt = _GetExcelTable.GetExcelData();
UserControl1 _myform = new UserControl1();
_myform.dataGridView1.Columns.Add("aaa", "aaaa");
_myform.dataGridView1.Rows.Add();
_myform.dataGridView1.Rows[0].Cells[0].Value = "1111";
_myform.dataGridView1.Rows[0].Cells[1].Value = "22222";
_myform.dataGridView1.Update();
_myform.dataGridView1.Refresh();
string abc = _myform.dataGridView1.Rows[0].Cells[0].Value.ToString();
_myform.label2.Text = abc;
}
}
但是在我定义的UserControl1中的dataGridView1中没有返回任何数据,跟踪的时候是有数据的,我用label也没有显示出数据,请教各位老师指导一下!
------解决方案--------------------this.Controls.Add(_myform);
否则UserControl不属于窗体,当然你看不到了。
------解决方案--------------------你可以写
UserControl1 GetExcelData()
{
...
_myform.label2.Text = abc;
return UserControl1;
}
主程序:
this.Controls.Add(GetExcelData());