未将对象引用设置到对象的实例(C#)

显示全部楼层 · 2009-8-11 13:14:55

picturebox跟button的tag这样子是读不到的尝试读其他

千问 · 2009-8-11 13:14:55

路径不对，检查下。

千问 · 2009-8-11 13:14:55

跟踪一下，你的这个string data = this.txtBookName.Text + "," + this.comboBoxGrade.SelectedItem.ToString() + "," + this.txtAuthor.Text + "," + this.txtPage.Text + "," + this.txtAdvice.Text + "," + this.txtNote.Text + "," + this.pictureTitle.Image.Tag.ToString() + "," + this.btnLoadBook.Tag.ToString();应该能得到值的不多....