无法将类型“string”隐式转换为“System.Web.UI.WebControls.TextBox”

Question

foreach (GridViewRow item in GVStorage.Rows)
                {
                    TextBox tbRawID = ((TextBox)item.FindControl("TBRawID"));
                    TextBox tbRawName = ((TextBox)item.FindControl("TBRawName"));
                    DropDownList ddlKind = ((DropDownList)item.FindControl("DDLKind"));
                    TextBox tbQuantity = ((TextBox)item.FindControl("TBQuantity"));
                    TextBox tbUnit = ((TextBox)item.FindControl("TBUnit"));
                    DropDownList ddlDepotCategory = ((DropDownList)item.FindControl("DDLDepotCategory"));
                    TextBox tbNotes = ((TextBox)item.FindControl("TBNotes"));
                    string sqlckid = "select count(*) from BaseRawMaterial where RawmaterialID = '" + tbRawID.Text + "'";
                    conn.Open();
                    comm.CommandText = sqlckid;
                    int count = (int)comm.ExecuteScalar();
                    conn.Close();
                    if (count > 0)
                    {
                        comm.CommandText = "select RawMaterial,Kind,Unit,PertainToDepartment,Notes from BaseRawMaterial where RawMaterialID = '" + tbRawID.Text + "'";
                        string SQLFDRawMaterial = string.Empty;
                        string SQLFDKind = string.Empty;
                        string SQLFDUnit = string.Empty;
                        string SQLFDPertainToDepartment = string.Empty;
                        string SQLFDNotes = string.Empty;
                        conn.Open();
                        using (SqlDataReader reader = comm.EndExecuteReader)
                       //comm 提示的
                       //错误 116 无法将类型“string”隐式转换为“System.Web.UI.WebControls.TextBox”
                        {
                            if (reader.Read())
                            {
                                SQLFDRawMaterial = Convert.ToString(reader["RawMaterial"]);
                                SQLFDKind = Convert.ToString(reader["Kind"]);
                                SQLFDUnit = Convert.ToString(reader["Unit"]);
                                SQLFDPertainToDepartment = Convert.ToString(reader["PertainToDepartment"]);
                                SQLFDNotes = Convert.ToString(reader["Notes"]);
                            }
                        }
                        conn.Close();
                        tbRawName = SQLFDRawMaterial;
                        ddlKind = SQLFDKind;
                        tbUnit = SQLFDUnit;
                        ddlDepotCategory = SQLFDPertainToDepartment;
                        tbNotes = SQLFDNotes;
                    }
这个是咋回事噢？？？

Answer 1

你说呢？    tbRawName = SQLFDRawMaterial;这类代码，为什么把一个sting赋值给TextBox？

Answer 2

                        tbRawName = SQLFDRawMaterial;
                        ddlKind = SQLFDKind;
                        tbUnit = SQLFDUnit;
                        ddlDepotCategory = SQLFDPertainToDepartment;
                        tbNotes = SQLFDNotes;tbRawName 这个不是textbox控件吗？这样写
tbRawName.Text=SQLFDRawMaterial

Answer 3

呃~~ 这个  大意了可是 上面的SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["ETHANConnectionString"].ConnectionString);
        SqlCommand comm = new SqlCommand();
        comm.Connection = conn;错误 116 无法将方法组“EndExecuteReader”转换为非委托类型“System.Data.SqlClient.SqlDataReader”。您是要调用方法吗? 这个提示是~~  ？

Answer 4

Text 属性才能接收 String.

Answer 5

using (SqlDataReader reader = comm.EndExecuteReader)错误 114 “EndExecuteReader”方法没有采用“0”个参数的重载

Answer 6

我晕，哪有什么EndExecuteReader这个方法？？？ using (SqlDataReader reader = comm.EndExecuteReader)=========> using (SqlDataReader reader = comm.ExecuteReader())

Answer 7

你少了括号吧
EndExecuteReader()

Answer 8

 using (SqlDataReader reader = comm.EndExecuteReader("由调用 BeginExecuteReader 返回的 IAsyncResult变量"))

Answer 9

参考：http://msdn.microsoft.com/zh-cn/library/1a674khd(v=VS.80).aspx