I need solution for error : unable to cast object of type 'system.int32' to type 'system.byte[]' when edit form

Question

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i design desktop application for Customer
i coding Edit Form
Class Customer_Operation has my Functions
My Error is
Unable to cast object of type 'System.Int32' to type 'System.Byte[]'.
i clicked f10 to debug my Application
My Error Here
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C#

C#

byte[] pa_img = (byte[])Customer_Function.Customer_Operation.Show_Customer_Image(Convert.ToInt32(this.dataGridView_ShowData.CurrentRow.Cells[0].Value )).Rows[0][0]; my Error Here

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Error Is
Unable to cast object of type 'System.Int32' to type 'System.Byte[]'.

What I have tried:

C#

public static DataTable Show_Customer_Image(int MyId) 

        {
            DataTable dt = new DataTable();
            SqlParameter[] p = new SqlParameter[1];
            p[0] = new SqlParameter("@Parameter_Id_FromForm", SqlDbType.Int);
            p[0].Value = MyId;
            ob.open();
            dt = ob.Reader("Show_Customer_Image", p);
            ob.close();
            return dt;


        }



private void btn_Edit_Click(object sender, EventArgs e)
        {
            Add_New_FORM add_New_FORM = new Add_New_FORM();
            add_New_FORM.btn_Add.Visible = false;
            add_New_FORM.btn_Delete.Visible = false;


            add_New_FORM.ID_TextBox.Text = this.dataGridView_ShowData.CurrentRow.Cells[0].Value.ToString();
            add_New_FORM.Name_TextBox.Text = this.dataGridView_ShowData.CurrentRow.Cells[1].Value.ToString();
            add_New_FORM.phone_TextBox.Text = this.dataGridView_ShowData.CurrentRow.Cells[2].Value.ToString();
            add_New_FORM.kind_TextBox.Text = this.dataGridView_ShowData.CurrentRow.Cells[3].Value.ToString();
            add_New_FORM.textBox4.Text = this.dataGridView_ShowData.CurrentRow.Cells[4].Value.ToString();
            add_New_FORM.FirstDate_TextBox.Text = this.dataGridView_ShowData.CurrentRow.Cells[5].Value.ToString();
            add_New_FORM.End_Date.Text = this.dataGridView_ShowData.CurrentRow.Cells[6].Value.ToString();
            add_New_FORM.Cost_TextBox.Text = this.dataGridView_ShowData.CurrentRow.Cells[7].Value.ToString();
            add_New_FORM.Paid_TextBox.Text = this.dataGridView_ShowData.CurrentRow.Cells[8].Value.ToString();
            add_New_FORM.remain_TextBox.Text = this.dataGridView_ShowData.CurrentRow.Cells[9].Value.ToString();
            add_New_FORM.NotesAboutTRAINING_TextBox.Text = this.dataGridView_ShowData.CurrentRow.Cells[10].Value.ToString();
           


  byte[] pa_img = (byte[])Customer_Function.Customer_Operation.Show_Customer_Image(Convert.ToInt32(this.dataGridView_ShowData.CurrentRow.Cells[0].Value )).Rows[0][0];
            MemoryStream ms = new MemoryStream(pa_img);
            add_New_FORM.pictureBox_ForTRAINER.Image = Image.FromStream(ms);
            add_New_FORM.ShowDialog();
        }

Posted 10-Apr-22 1:13am

ahmedbelal

Updated 10-Apr-22 6:22am

PIEBALDconsult

v2

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1 solution

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This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Richard MacCutchan · Answer 1 · 2022-04-10T01:23:00

Solution 1

As you have already been told in your previous question at Unable to cast object of type 'system.int32' to type 'system.byte[]'.[^], you cannot cast an integer value into a byte array. Whatever you are trying to do with that code, it will never work.

Posted 10-Apr-22 1:23am

Richard MacCutchan

Updated 10-Apr-22 1:24am

v2

Comments

ahmedbelal 10-Apr-22 7:35am

thanks Richard
But,
i repeat my question because it already worked in another project
So i want to Know why doesn't work

ahmedbelal 10-Apr-22 7:37am

it worked Here

private void btn_Update_FromGrid_Click(object sender, EventArgs e)
{
Forms.F_Patient f_Patient = new F_Patient();
f_Patient.btn_Add_NewPatient.Visible = false;
f_Patient.btn_Delete.Visible = false;
f_Patient.btn_Search.Visible = false;
label1.Text = "Update Patient";
f_Patient.PatientIDTextBox.Text = this.DGV.CurrentRow.Cells[0].Value.ToString();
f_Patient.PatientTCTextBox.Text = this.DGV.CurrentRow.Cells[1].Value.ToString();
f_Patient.PatientNameTextBox.Text = this.DGV.CurrentRow.Cells[2].Value.ToString();
f_Patient.PatientAgeTextBox.Text = this.DGV.CurrentRow.Cells[3].Value.ToString();
if (this.DGV.CurrentRow.Cells[4].Value.ToString() == "Male")
{
f_Patient.radioButton_Male.Checked = true;
}
else
{

f_Patient.radioButton_Female.Checked = true;

}
f_Patient.PatientPhoneTextBox.Text = this.DGV.CurrentRow.Cells[5].Value.ToString();
f_Patient.comboBox_ShowState.SelectedItem = (this.DGV.CurrentRow.Cells[6].Value);
f_Patient.dateTimeNOW.Value = Convert.ToDateTime(this.DGV.CurrentRow.Cells[7].Value.ToString());
f_Patient.EmailTextBox.Text = this.DGV.CurrentRow.Cells[8].Value.ToString();
f_Patient.PatientCostTextBox.Text = this.DGV.CurrentRow.Cells[9].Value.ToString();
f_Patient.PayedTextBox.Text = this.DGV.CurrentRow.Cells[10].Value.ToString();
f_Patient.RemindTextBox.Text = this.DGV.CurrentRow.Cells[11].Value.ToString();
byte[] pa_img = (byte[])ShowImage.Show_Patient_Image(Convert.ToInt32(this.DGV.CurrentRow.Cells[0].Value)).Rows[0][0];
MemoryStream ms = new MemoryStream(pa_img);
f_Patient.pictureBox1.Image = Image.FromStream(ms);
f_Patient.NOTES_TextBox.Text = this.DGV.CurrentRow.Cells[12].Value.ToString();
f_Patient.ShowDialog();
}

Richard MacCutchan 10-Apr-22 7:49am

The Show_Customer_Image method returns a DataTable. You are trying to convert the value in Rows[0][0] to a byte array, but it is obviously an integer. You need to look at the type of information that is being stored in the DataTable, especially the cell at location Rows[0][0].

ahmedbelal 10-Apr-22 8:45am

Mr Richard
Do you want to write my StoredProcedure and More Codes ?

Richard MacCutchan 10-Apr-22 11:29am

No thanks.

Dave Kreskowiak 10-Apr-22 13:02pm

First, nobody is going to write your code for you.

Second, nobody has any idea what this code is supposed to do.

Trying to convert whatever content is in the cell to an integer, then casting that integer to a byte array makes no sense. You've NEVER specified what that line of code is expected to do, so there's nothing anyone can tell you to fix it.

I need solution for error : unable to cast object of type 'system.int32' to type 'system.byte[]' when edit form

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Solution 1

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I need solution for error : unable to cast object of type 'system.int32' to type 'system.byte[]' when edit form

1 solution

Solution 1

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