How I can pass value from C# web application into stimulsoft textbox

Question

1.00/5 (1 vote)

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hi please help me about this problem:
how i can pass value from C# web application into stimulsoft TextBox:
my code :

C#

protected void Page_Load(object sender, EventArgs e)
    {
        this.txt_egample.Text = Decrypt(Request.QueryString["eg"]);
        this.txt_sh_p.Text = Decrypt(Request.QueryString["sh_p"]);
        this.txt_radif_mahkom.Text = Decrypt(Request.QueryString["radif_mah"]);
        this.txt_radif_dad.Text = Decrypt(Request.QueryString["radif_dad"]);
        StiWebViewer1.Visible = true;
        string ConnectionString = ConfigurationManager.ConnectionStrings["Database_ejraConnectionString"].ConnectionString;
        string serverlocation = HttpContext.Current.Server.MapPath(string.Empty);
        StiReport myreport = new StiReport();
        StiText txt = new StiText();
        myreport.Dictionary.Databases.Add(new Stimulsoft.Report.Dictionary.StiSqlDatabase("Coneection", ConnectionString));
        
        txt = (StiText)myreport.GetComponentByName("Text5");
        txt.Text = txt_egample.Text;
        myreport.Load(serverlocation + "\\rep\\Report2.mrt");
        myreport.Dictionary.Variables["sh_par"].Value = txt_sh_p.Text;
        myreport.Dictionary.Variables["rad"].Value = txt_radif_mahkom.Text;
        myreport.Dictionary.Variables["rad_dad"].Value = txt_radif_dad.Text;
        
        StiWebViewer1.Report = myreport;
    }

C#

i try above code but this error display on this line:
Object reference not set to an instance of an object.
txt.Text = txt_egample.Text;

thanks

What I have tried:

i try above code but this error display on this line:
Object reference not set to an instance of an object.
txt.Text = txt_egample.Text;

Posted 1-Apr-16 2:25am

rezaeti

Updated 1-Apr-16 3:07am

v8

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Comments

Jochen Arndt 1-Apr-16 8:40am

There is no line in your posted code snippet that contains the assignment from the error message.

rezaeti 1-Apr-16 8:42am

txt.Text = txt_date.Text;

rezaeti 1-Apr-16 8:42am

thanks for reply
can you help me?

rezaeti 1-Apr-16 8:43am

excuse me
this line is correct
txt.Text = txt_egample.Text;

Karthik_Mahalingam 1-Apr-16 9:51am

this function is returning null value
myreport.GetComponentByName("Text5");
make sure that "Text5" is available on the report

1 solution

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Jochen Arndt · Answer 1 · 2016-04-01T03:05:00

Solution 1

The error message indicates that either txt or txt_egample is NULL.

I guess it is txt when there is no component named "Text5" here:

C#

txt = (StiText)myreport.GetComponentByName("Text5")

You are also assigning to txt after you have allocated an StiText instance here so that this instance is never used:

C#

StiText txt = new StiText();

I don't know StimulSoft but it seems you can just use

C#

StiText txt = (StiText)myreport.GetComponentByName("Text5")

and omit the allocation. But you should still check if txt is valid (not empty).

[EDIT]
Sorry, I forget that you want to set the text.
There is a SetText function:

C#

StiText txt = (StiText)myreport.GetComponentByName("Text5");
txt.SetText(txt_egample.Text);

[/EDIT]

Posted 1-Apr-16 3:05am

Jochen Arndt

Updated 1-Apr-16 3:12am

v2

Comments

rezaeti 1-Apr-16 9:11am

thanks for reply i try it.
but my problem is remaind yet.

Jochen Arndt 1-Apr-16 9:15am

See my updated answer to set the text (hope it works that way).

But you must ensure that the component is present.
Only you can check (and should know) which components are present in the report.

rezaeti 1-Apr-16 9:12am

txt_egample is not null
but txt.Text is null
i dont know what is wrong in here?

rezaeti 1-Apr-16 9:25am

thanks Jochen Arndt dont work
the error :
Object reference not set to an instance of an object.

rezaeti 1-Apr-16 9:27am

i check and sure the txt_egample is exist in my page and Text5 also exist in my report

Jochen Arndt 1-Apr-16 9:41am

txt_egample exists because there would be other errors before.

txt_egample.Text will probably exist. There is an assignment:
txt_egample.Text = Decrypt(Request.QueryString["eg"]);
This would be only NULL when the above fails and returns NULL.

So it is very probable that the "Text5" component does not exist. But only you can check this.

Finally you may get better help in the StimulSoft forum:
http://forum.stimulsoft.com/viewforum.php?f=8