convert combobox to bytes for mare than 20 characters

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value was either Too large to too small for list error for combobox i tried converting it to int64.

Int64 k = Convert.ToInt64(textBoxQuantity.Text);
Int64 j = Convert.ToInt64(cbxListSN.Text);

for (Int64 i = 0; i < k; i++)
{
SerialListBox.Items.Add(j + i + 1);
}

but its not working. i have 20 digits.

i need to convert my combo box and listbox to bytes so it can take more than 20 characters.

currently its only taking lass than 10 characters.
but i want to put more than 20 character.

Posted 1-Mar-13 3:40am

ByakuyaKuchiki

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Ibrahim Uylas · Answer 1 · 2013-03-01T03:55:00

Solution 1

Hi,
I think you should set your value to combobox DisplayMember property not ValueMember.
So Try like this;

C#

DataTable dtList = new DataTable();
dtList.Columns.Add("Value");
dtList.Columns.Add("Text");

Int64 k = Convert.ToInt64(textBoxQuantity.Text);
Int64 j = Convert.ToInt64(cbxListSN.Text);

for (Int64 i = 0; i < k; i++)
{
DataRow dr = dtList.NewRow();
dr["Value"] = i;
dr["Text"] = j + i + 1;
dtList.Rows.Add(dr);
} 
SerialListBox.DataSource = dtList;

Posted 1-Mar-13 3:55am

Ibrahim Uylas

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ByakuyaKuchiki 4-Mar-13 1:25am

i tried this it not working.
i want to take value from combobox which is about 20 character and quantity from textbox and show increment sequence on list box.
it is working the problem is that it giving me error of too ling or too short list.
this error is comming becox my combo box is 20 characters.
i want to convert my combobox to bytes or somthing which will allow me to work with 20 character.

Ibrahim Uylas 4-Mar-13 2:01am

Did you set DisplayMember and ValueMember?
like:
SerialListBox.DisplayMember = "Text";
SerialListBox.ValueMember = "Value";

ByakuyaKuchiki 4-Mar-13 2:18am

yes.
i did.