将组合框转换为字节，大于20个字符 [英] convert combobox to bytes for mare than 20 characters

问题描述

对于组合框的列表错误，值太大到太小我尝试将其转换为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）;

}



但它不起作用。我有20位数。



i需要将我的组合框和列表框转换为字节，因此它可能需要超过20个字符。



目前它只占用10个以上的字符。

但是我想放20个以上字符。

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.

推荐答案

我认为你应该将你的值设置为combobox DisplayMember属性而不是ValueMember。

所以试试这个;

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

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;

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