c#在填写单价之后查询单价消失是为什么?
查询代码:
private void tsbreferml_Click(object sender, EventArgs e)
{
String material = tstxtmaterial.Text.Trim();
String connString = "Data Source=.;Initial Catalog=水利建筑工程预算定额;Integrated Security=True";
SqlConnection conn = new SqlConnection(connString);
conn.Open();
String sql = "select material_cd,material_nm,material_class,material_unit,material_price from MaterialInfo where material_nm like'%" + material + "%'";
ds2 = new DataSet();
DataTable dtml = new DataTable("MaterialInfo");
ds2.Tables.Add(dtml);
adapter2 = new SqlDataAdapter(sql, conn);
adapter2.Fill(ds2, "MaterialInfo");
dgvmaterial.DataSource = ds2.Tables["MaterialInfo"];
conn.Close();
}