小编gib*_*357的帖子

我想从0-9的范围内生成10个不同的数字.所需的输出可能如下所示,9 0 8 6 5 3 2 4 1 7

Dim arraynum(9) As Integer
Dim crmd As Boolean
Dim rmd as integer

For i = 0 To 9
    arraynum(i) = -1
Next i

crmd = True
Randomize Timer
For i = 0 To 9
    rmd = Int(Rnd * 10)
    For j = 0 To 9
        If arraynum(j) = rmd Then
            j = 9
            If crmd = False Then
                i = i - 1
            End If
            crmd = True
        Else
            crmd …

如何删除ListView中的行.我需要选择要删除的行,如果要删除该行,命令按钮将使用警告消息将其删除.那个代码是什么？

当我试图从结构中返回一个值时,我遇到了"空引用异常".

这是代码:

AssetItem item = new AssetItem(); 

        item = initModified();

        bool found = false;
        int index = getIndex(barcode);
        string modifiedFile = filepath + "Modified\\" + dir + "\\" + index + ".asdt";

        if(File.Exists(modifiedFile))
        {   
            using(StreamReader reader = new StreamReader(modifiedFile))
            {
                string line = reader.ReadLine();
                while(line.Trim()!="")
                {
                    string[] split = line.Split(',');
                    if(split[1]==barcode)
                    {
                        found = true;
                        break;
                    }
                    line = reader.ReadLine();
                }
                reader.Close();
            }
        }

        if(found)
        {
            item.modified = true; 
        }
        else
        {
            item.modified = false;
        }


        return item;

我通过调用包含该item.modified = …