c# error solve

Kishan shekhada

11y1.6kVisual Basic .NET

Object reference not set to an instance of an object.

how to solve this error please give me answer

28 Replies

Know the answer? Post it — somebody with the same question will find it here.

Upendra Pratap Shahi11y ago
If this helped you kindly accept the answer. and start a new thread for new question.
Kishan shekhada11y ago
Thank you sir....
Kishan shekhada11y ago
Thank you for support me.....

but sir how to find id of text box using foreach statement

Find Textbox Id From Second Column And Find Name By Removing "td_"
Upendra Pratap Shahi11y ago
Check below code-

PlaceHolder objPlace = new PlaceHolder();

Table objT = (Table)placeHolder.FindControl("tblPerson");

foreach (TableRow objTR in objT.Rows)

{

foreach (TableCell Cells in objTR.Cells)
{
TextBox txt1 = (TextBox)Cells.FindControl("textbox1");
TextBox kishan = Page.FindControl(name_id) as TextBox;
if(!string.isnullorEmpty(txt1))
{
string txt = txt1.Text.ToString();
string query = "select nid from mstInvestor";
}
else
{
//your else code part
}
}

}
Khan Abrar Ahmed11y ago
Hi try this

PlaceHolder objPlace = new PlaceHolder();
Table objT = (Table)placeHolder.FindControl("tblPerson");
foreach (TableRow objTR in objT.Rows)
{
foreach (TableCell Cells in objTR.Cells)
{
TextBox txt1 = (TextBox)Cells.FindControl("textbox1");
TextBox kishan = Page.FindControl(name_id) as TextBox;

if(!string.isnullorEmpty(txt1)){
string txt = txt1.Text.ToString();
string query = "select nid from mstInvestor";
}
}
}
Upendra Pratap Shahi11y ago
I think your textbox is inside other controls.

If textbox found on code page then kindly use above code.
Kishan shekhada11y ago
But sir error generate in this line

string txt = TextBox.Text.ToString();

this line is not suuported in my coding textbox1 is not show in my coding.
Upendra Pratap Shahi11y ago
Use this-

PlaceHolder objPlace = new PlaceHolder();

Table objT = (Table)placeHolder.FindControl("tblPerson");

foreach (TableRow objTR in objT.Rows)

{

foreach (TableCell Cells in objTR.Cells)
{
TextBox txt = (TextBox)Cells.FindControl("TextBox1");
TextBox kishan = Page.FindControl(name_id) as TextBox;
string txt = TextBox1.Text.ToString();
string query = "select nid from mstInvestor";
}

}
Kishan shekhada11y ago
PlaceHolder objPlace = new PlaceHolder();
Table objT = (Table)placeHolder.FindControl("tblPerson");
foreach (TableRow objTR in objT.Rows)
{
foreach (TableCell Cells in objTR.Cells)
{
TextBox txt = (TextBox)Cells.FindControl("textbox1");
TextBox kishan = Page.FindControl(name_id) as TextBox;
string txt = TextBox.Text.ToString();
string query = "select nid from mstInvestor";
Upendra Pratap Shahi11y ago
Share your code here.
Rajeev Punhani11y ago
Your Textbox is inside some other control so its not accessible.Please specify clearly or provide code.
For reference see link
https://social.msdn.microsoft.com/Forums/en-US/44572de4-c3b0-4847-a122-d1dd3569299b/error-cs0120-an-object-reference-is-required-for-the-nonstatic-field-method-or-property?forum=csharplanguage
Kishan shekhada11y ago
no sir it is not supported
Upendra Pratap Shahi11y ago
Put this inside a method like this-

protected void test()

{

string txt = TextBox1.Text.ToString();

}
Kishan shekhada11y ago
An object refrence is required for the non-static field method or property 'System.Web.UI.WebControls.Textbox.Text.get'
Upendra Pratap Shahi11y ago
What error have genrate this code dear?
Can you share this with your code snippt?
Kishan shekhada11y ago
i am using this code but it generate an error
Upendra Pratap Shahi11y ago
You are not using this code-
string txt = TextBox1.Text.ToString();

kindly use this code with your code-

string txt = TextBox1.Text.ToString();

this is not showing any error. if error occured then pasthe the code with error.
Kishan shekhada11y ago
Sorry it is not support this code
now that error is generate
Upendra Pratap Shahi11y ago
Your welcome.

String txt = TextBox.txt.tostring();

you are using wrong code.

Use below code-

string txt = TextBox1.Text.ToString();
If this help you kindly accept the answer.
Kishan shekhada11y ago
String txt = TextBox.txt.tostring();
it is generate an error
" 'System.Web.UI.WebControls.textbox' Does not contain definition for 'txt' "
Kishan shekhada11y ago
thank you very much......
Upendra Pratap Shahi11y ago
string txt= TextBox1.Text.ToString();
Kishan shekhada11y ago
How to find value of text boxes....??
Rajeev Punhani11y ago
Please tell in which line error is coming.I think
TextBox kishan = FindControl(name_id)as TextBox;
is where you are getting error you have not used (TextBox)Cells. in this line.
Anyway issue will be in finding control .
Upendra Pratap Shahi11y ago
Table objT = (Table)placeHolder.FindControl("tblPerson");
foreach (TableRow objTR in objT.Rows)
{
foreach (TableCell Cells in objTR.Cells)
{
TextBox txt = (TextBox)Cells.FindControl("textbox1");
TextBox kishan = Page.FindControl(name_id)as TextBox;
string query = "select nid from mstInvestor";
Kailash Polai11y ago
Hi, Please debug and see on which line you are getting the error.

Normally you are finding controls tblPerson and textbox1
i think here you may not get the object if the ids is not same as above.

1. In some cases you have to specify the ClientIdMode="Static" in the controls tags.

2. you can set the runat="server" so that you can dirctly get the control in CS
Kishan shekhada11y ago
Table objT = (Table)placeHolder.FindControl("tblPerson");
foreach (TableRow objTR in objT.Rows)
{
foreach (TableCell Cells in objTR.Cells)
{
TextBox txt = (TextBox)Cells.FindControl("textbox1");
TextBox kishan = FindControl(name_id)as TextBox;
string query = "select nid from mstInvestor";
Upendra Pratap Shahi11y ago
Its a normal error what you are getting.

Please provide the code for proper solution.

Hint: In your code there is some object which is NULL. and you will be trying to read some property value of that object.

This is the reason for the Object reference not set to an instance of an object.

go through below link-

http://forums.asp.net/t/1808030.aspx?How+to+fix+object+reference+not+set+to+an+instance+of+an+object+