SelectedCells索引超出范围。必须为非负值并小于集合大小

网上搜了一下，说是表格点击选中的并非是整行，而是单个单元格是在vs2012里面进行的
代码如下：

    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        SqlConnection conn;
        DataSet ds;
        SqlDataAdapter sda;
        private void Form1_Load(object sender, EventArgs e)
        {
            conn = new SqlConnection("Data Source=.; database=db_test;integrated security=true");
            SqlCommand cmd = new SqlCommand("select * from [db_test].[dbo].[sheet1]", conn);//获取表中所有数据
            sda = new SqlDataAdapter();
            sda.SelectCommand = cmd;
            ds = new DataSet();
            sda.Fill(ds, "cs");
            dataGridView1 .DataSource =ds.Tables [0];
        }

        private void button1_Click(object sender, EventArgs e)
        {
            DataTable dt=ds.Tables ["cs"];
            sda.FillSchema(dt,SchemaType.Mapped);
            DataRow dr = dt.Rows.Find(textBox1.Text);
            dr["耕地面积"] = textBox2.Text.Trim();
            dr["水田"] = this.textBox3.Text.Trim();
            dr["旱田"] = this.textBox4.Text.Trim();
            dr["村民小组"] =this. textBox5.Text.Trim();
            dr["户数"] = this.textBox6.Text.Trim();
            dr["总人口"] =this. textBox7.Text.Trim();
            dr["农民人均纯收入"] = this.textBox8.Text.Trim();
            dr["农林牧渔业总产值(现价)"] = this.textBox9.Text.Trim();
            SqlCommandBuilder cmdbuilder = new SqlCommandBuilder(sda);
            sda.Update(dt);
        }
        private void dataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)
        {
            textBox1.Text = dataGridView1.SelectedCells[0].Value.ToString();
            textBox2.Text = dataGridView1.SelectedCells[1].Value.ToString();
            textBox3.Text = dataGridView1.SelectedCells[2].Value.ToString();
            textBox4.Text = dataGridView1.SelectedCells[3].Value.ToString();
            textBox5.Text = dataGridView1.SelectedCells[4].Value.ToString();
            textBox6.Text = dataGridView1.SelectedCells[5].Value.ToString();
            textBox7.Text = dataGridView1.SelectedCells[6].Value.ToString();
            textBox8.Text = dataGridView1.SelectedCells[7].Value.ToString();
            textBox9.Text = dataGridView1.SelectedCells[8].Value.ToString();
        }

        private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
        {
            
        }
    }

5 个解决方案

#1

你先看看SelectedCells有没有，你访问那么多，不存在的话肯定报错

#2

不好意思啊，才看到回复！

#3

dr["耕地面积"] = textBox2.Text.Trim();
            dr["水田"] = this.textBox3.Text.Trim();
            dr["旱田"] = this.textBox4.Text.Trim();
            dr["村民小组"] =this. textBox5.Text.Trim();
            dr["户数"] = this.textBox6.Text.Trim();
            dr["总人口"] =this. textBox7.Text.Trim();
            dr["农民人均纯收入"] = this.textBox8.Text.Trim();
            dr["农林牧渔业总产值(现价)"] = this.textBox9.Text.Trim();
这里总共 8个单元格
 textBox1.Text = dataGridView1.SelectedCells[0].Value.ToString();
            textBox2.Text = dataGridView1.SelectedCells[1].Value.ToString();
            textBox3.Text = dataGridView1.SelectedCells[2].Value.ToString();
            textBox4.Text = dataGridView1.SelectedCells[3].Value.ToString();
            textBox5.Text = dataGridView1.SelectedCells[4].Value.ToString();
            textBox6.Text = dataGridView1.SelectedCells[5].Value.ToString();
            textBox7.Text = dataGridView1.SelectedCells[6].Value.ToString();
            textBox8.Text = dataGridView1.SelectedCells[7].Value.ToString();
            textBox9.Text = dataGridView1.SelectedCells[8].Value.ToString();
这里却是9个单元格。。。。。。所以肯定超出了最大索引

#4

SelectedCells应该是选中单元格的集合吧，你放在CellClick事件里，执行时肯定只有一格被选中啊，第二句应该就报错了

#5

textBox1.Text = dataGridView1.SelectedCells[0].Value.ToString();
            textBox2.Text = dataGridView1. SelectedRows[0].Cells[1].Value.ToString();
            textBox3.Text = dataGridView1 .SelectedRows[0].Cells[2].Value.ToString();
            textBox4.Text = dataGridView1. SelectedRows[0].Cells[3].Value.ToString();
            textBox5.Text = dataGridView1.SelectedRows[0].Cells[4].Value.ToString();
            textBox6.Text = dataGridView1.SelectedRows[0].Cells[5].Value.ToString();
            textBox7.Text = dataGridView1.SelectedRows[0].Cells[6].Value.ToString();
            textBox8.Text = dataGridView1.SelectedRows[0].Cells[7].Value.ToString();
            textBox9.Text = dataGridView1.SelectedRows[0].Cells[8].Value.ToString();