CODEWITHSUNDEEP
c#asp.netviewstate
DebPepDevuan
DebPepDevuan

Reputation: 489

View State not working correctly Asp.Net c#

I have a gridview that has columns for the days of the week. I run this code on the fist load of the page so that the dates are correct.

if (!IsPostBack) {//my public function to set the dates, It works as expected.
    setUpGrid ();
}

Then I have button that when clicked will show the following week 7 days in the future. That all works as well.

Here is the code:

protected void NWeeks_Click(object sender, EventArgs e) {
    DateTime hd2 = Convert.ToDateTime(gvappts.Columns[2].HeaderText);
    if (ViewState["hd2"] == null) {
        ViewState["hd2"] = 0;
    }
    ViewState["hd2"] = ((int) ViewState["hd2"]) + 7;
    gvappts.Columns[2].HeaderText = hd2.AddDays((int) ViewState["hd2"]).ToString(
        "ddd dd MMM", CultureInfo.CreateSpecificCulture("en-US")
    );
}

My problem is, you have to click the button twice before it will fire off the next week calculations. I thought the ViewState would take care of this but not sure where I am going wrong.

Upvotes: 1

Views: 501

Answers (2)

Laslos
Laslos

Reputation: 360

I imagine you could move your code to the Page_LoadComplete event to ensure all controls are loaded when setUpGrid() is called.

Check out ASP.Net Page Life Cycle

void  Page_LoadComplete(object sender, EventArgs e)
{
    if (!IsPostBack) 
    { 
       setUpGrid ();
    }
}

Upvotes: 0

DebPepDevuan
DebPepDevuan

Reputation: 489

I realized after looking at this for a while that since I am dealing with a GridView in order to refresh the HeaderText you also have to DataBind the Gridview. Adding a simple GridviewName.DataBind (); to my function solved my problem.

Upvotes: 1

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