错误：索引超出范围。必须是非负数且小于集合的大小

Question

我正在从数据库中检索数据到 gridview textbox 数据库中有两行但无法获取：

    string sr_no;
    int rowIndex = 0;

            for (int i = 1; i <= dt1.Rows.Count; i++)
            {
                //extract the TextBox values
                TextBox box1 = (TextBox)Gridview1.Rows[rowIndex].Cells[1].FindControl("TextBox1");
                TextBox box2 = (TextBox)Gridview1.Rows[rowIndex].Cells[2].FindControl("TextBox2");
                TextBox box3 = (TextBox)Gridview1.Rows[rowIndex].Cells[3].FindControl("TextBox3");
                TextBox box4 = (TextBox)Gridview1.Rows[rowIndex].Cells[4].FindControl("TextBox4");
                TextBox box5 = (TextBox)Gridview1.Rows[rowIndex].Cells[5].FindControl("TextBox5");
                TextBox box6 = (TextBox)Gridview1.Rows[rowIndex].Cells[6].FindControl("TextBox6");
                TextBox box7 = (TextBox)Gridview1.Rows[rowIndex].Cells[7].FindControl("TextBox7");
                TextBox box8 = (TextBox)Gridview1.Rows[rowIndex].Cells[8].FindControl("TextBox8");

                box1.Text = dt1.Rows[i-1]["RD_PS_APPLab_Parameter"].ToString();
                sr_no = dt1.Rows[i-1]["RD_SR_No"].ToString();
                box2.Text = dt1.Rows[i-1]["Test"].ToString();
                box3.Text = dt1.Rows[i-1]["Test_Condition"].ToString();
                box4.Text = dt1.Rows[i-1]["Method"].ToString();
                box5.Text = dt1.Rows[i-1]["CTQ"].ToString();
                box6.Text = dt1.Rows[i-1]["Specification_RD_PS_AppLab"].ToString();
                box7.Text = dt1.Rows[i-1]["UOM"].ToString();
                box8.Text = dt1.Rows[i-1]["Remarks"].ToString();
                rowIndex++;
            }

我遇到了错误

错误：索引超出范围。必须是非负数且小于 集合的大小

Answer 1

那里有两个概率

1) 你的网格没有 8 个单元格

2)您的for loop 不正确 而不是

for (int i = 1; i <= dt1.Rows.Count; i++)
            {
//...
}

试试这个

for (int i = 1; i < dt1.Rows.Count; i++)
            {
/..
}

注意，如果你的总线逻辑，你应该从 0 开始循环

所以你的for循环会是这样的

for (int i = 0; i < dt1.Rows.Count; i++)
                {
    /..
    }