this.DropDownList1.SelectedValue = "5"，没对应上，S...

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SelectedValue = "5" 这个是设置选项中Value等5的项选中.

没有就没有选中的,SelectedValue当然等于“”

其他类似问题

问题1：this.ddlCourse.SelectedValue啥意思[数学科目]

ddlCourse肯定是一个DropDownList控件,SelectedValue就是当前所选的项的值.

问题2：maroon 5 never gonna leave this bed 中文歌词Maroon 5 - Never Gonna Leave This BedLyrics by yvonne @ LK歌词组You push me,I don't have the strength toResist or control youSo take me down,take me downYou hurt me,But do I deserve thisYou make me s

You push me,你催促着我

I don't have the strength to

Resist or control you我没有力量来抵抗或者控制你

So take me down, take me down所以放过我,放过我

You hurt me,你伤害了我

But do I deserve this但是我罪有应得

You make me so nervous你让我如此紧张

Calm me down, calm me down让我平静下来

Wake you up in the middle of the night to say,在半夜唤醒你,对你说

I will never walk away again我决不会再次走开

I'm never gonna leave this bed我决不会离开这张床

So come here and never leave this place所以过来我身边,永远不要离开这个地方

Perfection of your face你完美的脸

Slows me down, slows me down阻拦了我的坠落

So fall down所以坠落吧

I need you to trust me我需要你相信我

Go easy, don't rush me放轻松,不要逼迫我

Help me ou帮助我解脱

Why don't you help me out为什么不帮助我解脱

Wake you up in the middle of the night to say,在半夜唤醒你,对你说

I will never walk away again我决不会再次走开

I'm never gonna leave this bed我决不会离开这张床

So you say go所以你说离开

It isn't worth it它并不值得

And I say no我说不

It isn't perfect它现在并不完美

So I stay and still所以我依然在这

I'm never gonna leave this bed我决不会离开这张床

Take it, take it all拿走,全部拿走

Take all that I have把我所拥有的一切全部拿走

I'd give it all away just to get you back我将放弃一切,只要你可以回来

And fake it, fake it伪装伪装

I'll take what I can get我将拿走我所能得到的一切

Knocking so loud大声的敲打

Can you hear me yet?你现在是否能听到我的呼喊

Try to stay awake试着保持清醒

But you can't forget但是你不能忘记

Wake you up in the middle of the night to say,在半夜唤醒你,对你说

I will never walk away again我决不会再次走开

I'm never gonna leave this bed我决不会离开这张床

So you say go所以你说离开

It isn't worth it它并不值得

And I say no我说不

It isn't perfect它现在并不完美

So I stay and still所以我依然在这

I'm never gonna leave this bed我决不会离开这张床

Take it, take it all拿走,全部拿走

Take all that I have把我所拥有的一切全部拿走

Take it, take it all拿走,全部拿走

Take all that I have把我所拥有的一切全部拿走

Take it, take it all拿走,全部拿走

Take all that I have把我所拥有的一切全部拿走

Take it, take it all拿走,全部拿走

Take all that I have把我所拥有的一切全部拿走

哈哈 完成一个!

问题3：this is my day只要五句话提示：get up,brush teeth,eat breakfast,go to school........[英语科目]

This is my day

I get up at twenty past six.At seven o'clock,I eat breakfast.Then,I go to school by bus.I have lunch at school.I go back my home at five.After homework,Igo to bed at nine o'clock.

给分啊!

问题4：在一固定容积的密闭容器中,保持一定温度,在一定条件下进行如下反应A(g)+2B(g) 3C(g),已知起始时加入1molA(g)和3mol B(g),达平衡后,生成amol C(g).（1）当反应达到平衡时,C(g)在反应混合气中的体积分[化学科目]

（1）_____a/4____（2）___2a___mol __不变____（3）__6___mol C.

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My name is wangzeyu and my English name is sharpshooter,I'm 11 years old,my favourite colour is blue,my favour food is chicken .

I am live in AnHui,I am very like AN hui,I hope An hui change in to a model save.

I usually angry,this is my short coming,and I easily,laugh ,this is my merit

Iam very like fairy tale ,because I have imagination ,It is my merit ,too.

This is me,do you want to play with me?