C#中刚进入for循环，不知为何立即就跳出去了，在线等各位回复

Question

我用C#做图书管理系统，其中借书控件里面有一条语句刚进for循环就立即跳出来，无语法错误，逻辑错误也找不到，在线求回复！
 private void borbtn_Click(object sender, EventArgs e)
        {
            for (int i = 0; i < this.bkifcklbox.Items.Count; i++)
            {
                this.bkifcklbox.SetItemChecked(i, false);
            }            //在借书之前删除在bookinfo所有选中的标记
            SqlConnection thisConnection = new SqlConnection("Data Source=localhost;Initial Catalog=Library;Integrated Security=SSPI;");
            DataSet thisDataSet = new DataSet();
            SqlDataAdapter bookAdapter = new SqlDataAdapter("SELECT * FROM dbo.Book", thisConnection);
            SqlCommandBuilder bookBuilder = new SqlCommandBuilder(bookAdapter);
            bookAdapter.Fill(thisDataSet, "book");
            SqlDataAdapter brrowAdapter = new SqlDataAdapter("SELECT * FROM dbo.User_Book WHERE UserID='+p' ", thisConnection);
            SqlCommandBuilder brrowBuilder = new SqlCommandBuilder(brrowAdapter);
            brrowAdapter.Fill(thisDataSet, "brrow");
            for (int i = 0; i< g; i++)//就是这个for循环，刚进去就跳出来了，里面的语句无法执行 
            {
                if (this.bkifcklbox.GetItemChecked(i)==true)
                {
                    if (h[i] == 0) MessageBox.Show("此书本馆已经全部借出！"); 
                    else
                    {
                        MessageBox.Show("借阅成功！您可以点击查看借书按钮查看您的已借书目！");
                        foreach(DataRow thatRow in thisDataSet.Tables["book"].Rows){
                            if(Convert.ToInt32(thatRow["ID"]) == a[i]){
                            thatRow["Num"] = h[i] - 1;
                            bookAdapter.Update(thisDataSet, "book");
                            }
                        }
                        foreach (DataRow theRow in thisDataSet.Tables["brrow"].Rows)
                        {
                            if (Convert.ToInt32(theRow["BookID"]) == a[i])
                                theRow["BroNum"] = Convert.ToInt32(theRow["BroNum"]) + 1;
                            else
                            {
                                DataRow thisRow = thisDataSet.Tables["brrow"].NewRow();
                                thisRow["UserID"] = p;
                                thisRow["BookID"] = a[i];
                                thisRow["BookName"] = b[i];
                                thisRow["Author"] = c[i];
                                thisRow["Press"] = d[i];
                                thisRow["Year"] = f[i];
                                thisRow["BroNum"] = 1;
                                thisDataSet.Tables["brrow"].Rows.Add(thisRow);
                                brrowAdapter.Update(thisDataSet, "brrow");
                            }
                        }
                    }
                }
           }
        }

Answer 1

在跑到for循环时,先看一下,g的值是多少,如果g值小于等于i了,当然就跳出来 了

Answer 2

没看到那个i<g,这g从哪来的,不好判断

Answer 3

敢问lz的i<g的g是哪儿来的 先解决这个才能坐进一步判断

Answer 4

 this.bkifcklbox.Items.Count应该等于0了

Answer 5

这样的问题，你这样问如果没有明显的语法错误，谁都看不出来。首先你没说清楚什么叫做刚进去就跳出来，执行到那个语句就跳出来了，有没有执行for循环里面的第一个if语句，是否条件不成功才跳出来了，不明不白就上来问，你自己断点调试一下，看看是那条语句跳出来的，在检查一下不就行了。