Object reference not set to an instance of an object while rendering textbox in MVC

Question

WHen Control comes to following helper,object ref error occurs , I don't know why?

 @Html.TextBoxFor(m => m[i].SundayDriveTime, new {@class = "smallTxtEntry0 daysDriveTime sundayDriveTime", @id = "PredefinedDriveTimeDetailsList_" + i + "_SundayDriveTime", oldValue = Model[i].SundayDriveTime, @onchange = "driveTimeDayValuesOnchnge(this)" })</td>

Model count is not zero and also SundayDriveTime alos has value My model is :@model List<PredefinedDriveTimeDetails>

It does not show error while rendering other text boxes.

what is the problem??

Show the loop where you use this code. I guess it has to do with the m in m[i], but my crystal ball doesn't help me further. — Raphaël Althaus
– Raphaël Althaus, Commented Jul 9, 2014 at 7:08
@for (int i = 0; i < Model.Count; i++) {<td style="vertical-align: middle;">@Html.TextBoxFor(m => m[i].SaturdayDriveTime)</td> <td style="vertical-align: middle;">@Html.TextBoxFor(m => m[i].SundayDriveTime)</td>} — S2K
– S2K, Commented Jul 9, 2014 at 7:09
Razor errors can sometimes be a little misleading; it's possible that the actual error is in a very different location than that line of code. Try commenting out that/those TextBoxFors and see if the issue continues to occur? — eouw0o83hf
– eouw0o83hf, Commented Jul 9, 2014 at 7:34

Community · Accepted Answer · 2017-05-23 10:32:23Z

0

Got your for loop code from comment. what you are doing wrong is referencing m => m[i] which should be m => Model[i]

Try using following code

@for (int i = 0; i < Model.Count; i++)
{
    <td style="vertical-align: middle;">@Html.TextBoxFor(m => Model[i].SaturdayDriveTime)</td>
    <td style="vertical-align: middle;">@Html.TextBoxFor(m => Model[i].SundayDriveTime)</td>
}

References

ASP.NET MVC 4 - for loop posts model collection properties but foreach does not

MVC with TextBoxFor having same id within loop

MVC 3 - Model Binding a list in a table with each record being a column instead of row

edited May 23, 2017 at 10:32

CommunityBot

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answered Jul 9, 2014 at 7:24

Ashwini Verma

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2 Comments

Ashwini Verma Over a year ago

@eouw0o83hf: Please see my added references.

eouw0o83hf Over a year ago

Wow, color me surprised. Deleting my previous remark because it's apparently just wrong and misleading.

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