replace问题

Question

float Soupmedmoney =float.Parse(txtSoupmedmoney.Text.Replace("","0"));
这句话的写法怎么不对?

Answer 1

试试这样的
float Soupmedmoney =float.Parse(txtSoupmedmoney.Text.ToString().Replace("","0"));

Answer 2

一样出错
字符串的长度不能为零。参数名: oldValue 

Answer 3

float Soupmedmoney =txtSoupmedmoney.Text.trim().Length==0 ? 0 : float.Parse(txtSoupmedmoney.Text.Trim());

Answer 4

float Soupmedmoney =float.Parse(txtSoupmedmoney.Text.PadLeft(1,'0'));