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A:
Its because your are trying to use a string instead of a cell, but your trying to cast that to a double. Change the line:
Decimal num1 = (Decimal)row["Prix"];
To:
Decimal num1 = Convert.ToDecimal(row["Prix"]);
And it should work fine.
Q:
How to make the data type of my column equal to 'none' when using SQL?
I have a column in my mysql table that is set to none, so how to make the data type of that column equal to number(6,2)?
A:
you can add a trigger on that column
CREATE TRIGGER SET_TYPE
AFTER INSERT ON
FOR EACH ROW
BEGIN
IF NEW.type OLD.type THEN
ALTER TABLE CHANGE TYPE ;
END IF;
END
this way you can set the column to any type you want
Q:
The Html.DropDownList not shown
I am trying to dynamically add a DropDownList to the View.
My Class:
public class HomeEditViewModel
{
public SelectList CountryList { get; set; }
public SelectList CityList { get; set; }
}
And My Controller:
[HttpPost]
public ActionResult Edit(HomeEditViewModel model)
{
if (ModelState.IsValid)
{
//update
return View(model);
}
return View(model);
}
View:
@model MvcApplication1.ViewModels.HomeEditViewModel
@{
ViewBag.Title = "Index";
}
Index
@Html.ActionLink("Create New", "Create")
@Html.ValidationSummary(true, "", new { @class = "text-danger"
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