c# - 由于索引超出范围，无法设置列标题文本

Question

我有两个方法会在单击按钮后运行，bgEqptRec() 和 receiveHeader()。 bgEqptRec() 包含设置列标题标题的 recieveHeader()。但由于索引超出范围而无法设置。我很确定我使用的是 SQL Server 中正确数量的索引。这是代码:

private void btnSearch_Click(object sender, EventArgs e)
{
        bgEqptRec();
}

private void bgEqptRec()
        {
            receiveHeader();
            gvSearch.DataSource = null;
            using (var connect = connection.getConnection())
            {
                using (SqlCommand cmd = new SqlCommand("SELECT * FROM receive WHERE rec_stat='IN' AND rec_date BETWEEN '" + dtpFrom.Text + "' AND '" + dtpTo.Text + "'"))
                {
                    cmd.Connection = connect;
                    cmd.CommandType = CommandType.Text;
                    using (SqlDataAdapter da = new SqlDataAdapter(cmd))
                    {
                        using (DataTable dt = new DataTable())
                        {
                            da.Fill(dt);
                            gvSearch.DataSource = dt;
                        }
                    }
                }
            }
        }

private void receiveHeader()
        {
            gvSearch.Columns[0].HeaderText = "Supplier";
            gvSearch.Columns[1].HeaderText = "Invoice";
            gvSearch.Columns[2].HeaderText = "Brand";
            gvSearch.Columns[3].HeaderText = "Model";
            gvSearch.Columns[4].HeaderText = "Equipment";
            gvSearch.Columns[5].HeaderText = "Serial No.";
            gvSearch.Columns[6].HeaderText = "Price";
            gvSearch.Columns[7].HeaderText = "PO No.";
            gvSearch.Columns[8].HeaderText = "Release Date";
            gvSearch.Columns[9].HeaderText = "Release By";
            gvSearch.Columns[10].HeaderText = "Status";
        }

VS报错是“Index was out of range. Must be non-negative and less than the size of the collection”。

Answer 1

希望问题是:在调用 receiveHeader(); 方法时，网格的 dataSource 为 null 或少于 11 的几列，因为您正在使用 列 [10]。所以我建议你在为网格分配数据源之后调用该方法。确保查询返回至少 11 列。这意味着代码将是这样的:

using (var connect = connection.getConnection())
{
   using (SqlCommand cmd = new SqlCommand("SELECT * FROM receive WHERE rec_stat='IN' AND rec_date BETWEEN '" + dtpFrom.Text + "' AND '" + dtpTo.Text + "'"))
   {
      // rest of code
      gvSearch.DataSource = dt;
    }
}
// call the method here since the grid is populated

receiveHeader();