Question

索引超出范围。必须为非负值并小于集合大小。

SqlDataAdapter mycommand = new SqlDataAdapter(strcom, connection);

mycommand.Fill(mydataset, "teacher");

dataGridView1.DataSource = mydataset.Tables["teacher"];
dataGridView1.Visible = true;
connection.Close();
【 this.textBox1.Text = this.dataGridView1.SelectedRows[0].Cells[0].Value.ToString();】
this.textBox2.Text = this.dataGridView1.SelectedRows[0].Cells[1].Value.ToString();

【】内提示上边那个错误 怎么回事啊？

Answer 1

if(dataGridView1.Rows.Count>0) //加这个判断，
{
this.textBox1.Text = this.dataGridView1.SelectedRows[0].Cells[0].Value.ToString();
this.textBox2.Text = this.dataGridView1.SelectedRows[0].Cells[1].Value.ToString();
}

Answer 2

绑定的时候dataGridView1没有SelectedRows集合，修改代码为
this.textBox1.Text = this.dataGridView1.Rows[0].Cells[0].Value.ToString();

Answer 3

你的dataGridView1有选中行吗？