将Guid值分配给C＃变量，即字符串

Question

I am trying to capture GUID value and store in string variable but getting null value

Model

public string StudentRemediationSignatureCheckGuid { get; set; }

ContextSession give me GUID value which I like to assign to variable above define

_assessmentRemidationObject.StudentRemediationSignatureCheckGuid = ContextSession.GUID.ToString(); 

update code

  public string SeniorAssessorGuid = string.Empty; //global variable


 protected void checkBoxSeniorAssessorSignature_CheckedChanged(object sender, EventArgs e)
    {
        CheckBox SelectedCheckBoxObject4 = (CheckBox)sender;

        if (SelectedCheckBoxObject4.Checked)
        {

            TxtBoxSeniorAssessorSignatureDate.Text = System.DateTime.Now.ToString("d/M/yyyy");

            _assessmentRemidationObject.SeniorAssessorSignatureCheckGuid = ContextSession.GUID.ToString(); 
            SeniorAssessorGuid = ContextSession.GUID.ToString(); 
        }
        else if (!SelectedCheckBoxObject4.Checked)
        {
            TxtBoxSeniorAssessorSignatureDate.Text = string.Empty;

        }
    }

Answer 1

Do not store the value of the ContextSession.GUID in a member of your page _assessmentRemidationObject if you loose its value. You need to use a global variable or a persistent storage (a database for example). Try to find where _assessmentRemidationObject is resetted before you read it.