Question

通过这段代码我得到错误“输入数组比这个表中的列数长”

DataTable dtMain = new DataTable();
var qry = from c in db.Categories where c.SubCategoryName.Contains(txtSearch.Text.Trim()) select c;
foreach (var k in qry)
{
      var qry1 = from c in db.ProductMasters where c.ProductNameID == k.CategoryID
                  select new { ProductID = c.ProductID, 
                               TagID = c.TagID, 
                               ProductNameID = (from d in db.Categories 
                                                where d.CategoryID == c.ProductNameID 
                                                select d.SubCategoryName).FirstOrDefault(),
                               CategoryID = (from d in db.Categories 
                                                 where d.CategoryID == c.CategoryID 
                                                 select d.CategoryName).FirstOrDefault(), 
                               ProductType = c.ProductType, 
                               Maker = c.Maker, 
                               Model = c.Model, 
                               SerialNo = c.SerialNo, 
                               MACAddress = c.MACAddress, 
                               Warranty = c.Warranty, 
                               Price = c.Price, 
                               ProductOrderNo = c.ProductOrderNo, 
                               VendorID = (from d in db.Vendors 
                                           where d.VendorID == c.VendorID 
                                           select d.VendorName).FirstOrDefault(), 
                               PurchaseDate = c.PurchaseDate.ToString().Substring(0, 10), 
                               ProductStatus = c.ProductStatus, 
                               Remark = c.Remark };
     dtMain.Rows.Add(qry1);

 }

gridProduct.DataSource = dtMain;
gridProduct.DataBind();

Answer 1

数据表适用于行和列概念。你需要先提到所有的列名。像这样在数据表中添加行。

DataTable dtMain = new DataTable();


for (int i = 0; i < rows .Count(); i++)
            {

                DataRow datarowObj= dtMain .NewRow();
                datarowObj["A"] = yourValue;
                datarowObj["B"] = yourValue;
                datarowObj["C"] = yourValue;
                dtMain .Rows.Add(datarowObj);
            }

或者像SLAKS提到的关于bindingList。您可以使用。的BindingList

return new BindingList<YourClass>(qry1.ToList())

多个查询使用linq分配给asp.net c＃中的gridview控件

1 个答案: