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[英]ASP.NET C# Set OnSelectedIndexChanged from Code Behind
[英]Is there a better way of doing this? ASP.NET/C#/Code Behind
我創建了這個方法,因此它會更新頁面上的LABEL。 我們這里有一堆復選框,表明這個人是否有任何限制。 當用戶登錄並看到復選框時,我希望標簽顯示已檢查的標簽,以便用戶更容易查看該人員的限制。
我是C#和ASP.NET的新手,我想知道的是,是否有更好/更容易/更有效的方法來解決這個問題? 我發現的第一件事是String.Concat,這就是我在下面的代碼中使用它的原因。 此外,我似乎無法獲得行返回(a(br /))在后面的代碼中工作(我明白(br /)將無法在后面的代碼中工作)。 我嘗試了很多不同的方法,似乎沒有工作,這就是我在字符串中拋出COMMA的原因。 有什么建議?
protected void LblLimitsLabel()
{
String strBend = "", strDryDust = "", strStanding = "", strHearing = "", strHeights = "", strHepatitis = "", strLifting = "", strMachines = "", strPulling = "", strPushing = "", strReaching = "", strSeizures = "", strSuddenTemp = "", strVisual = "", strWalking = "", strWheelchair = "", strHelmet = "", strOther = "";
if (chkBend.Checked)
strBend = "Bend/Stoop, ";
if (chkDryDusty.Checked)
strDryDust = "Dry/Dusty, ";
if (chkHearing.Checked)
strHearing = "Hearing, ";
if (chkHeights.Checked)
strHeights = "Heights, ";
if (chkHepatitis.Checked)
strHepatitis = "Hepatitis, ";
if (chkLifting.Checked)
strLifting = "Lifting, ";
if (chkMachines.Checked)
strMachines = "Machines, ";
if (chkPulling.Checked)
strPulling = "Pulling, ";
if (chkPushing.Checked)
strPushing = "Pushing, ";
if (chkReaching.Checked)
strReaching = "Reaching, ";
if (chkSeizures.Checked)
strSeizures = "Seizures, ";
if (chkStanding.Checked)
strStanding = "Standing, ";
if (chkSuddenTemp.Checked)
strSuddenTemp = "Sudden Temp. Changes, ";
if (chkVisual.Checked)
strVisual = "Visual, ";
if (chkWalking.Checked)
strWalking = "Walking, ";
if (chkWheelchair.Checked)
strWheelchair = "Wheelchair, ";
if (chkHelmet.Checked)
strHelmet = "Helmet, ";
strOther = TextBox1.Text;
LblLimits.Text = String.Concat(strBend, strDryDust, strStanding, strHearing, strHeights, strHepatitis, strLifting, strMachines, strPulling, strPushing, strReaching, strSeizures, strSuddenTemp, strVisual, strWalking, strWheelchair, strHelmet, strOther);
}
如果需要在ASP.NET標簽中顯示新行,則需要嵌入<br/>
標記。
StringBuilder SB = new StringBuilder(); if (chkBend.Checked) SB.AppendLine("Bend/Stoop, "); if (chkDryDusty.Checked) SB.AppendLine("Dry/Dusty, "); // and so on SB.Append(TextBox1.Text); LblLimits.Text = SB.ToString();
當你對C#和ASP.NET更加熟悉時,我建議繼續使用像CheckBoxList這樣的數據綁定控件
參考
是的,如果您不使用它,可以在CheckBox的屬性(如ToolTip)中設置要附加到字符串的文本。 然后你可以使用這個循環:
string s = "";
foreach (Control item in this.Controls)
{
if (item is CheckBox)
{
CheckBox temp = item as CheckBox;
if (temp.Checked)
{
s += temp.ToolTip + ", ";
}
}
}
s = s.Substring(0,s.length-3);
's'有你想要的字符串;
嘗試在asp.net中的CheckBoxList控件。 示例: http : //www.w3schools.com/aspnet/showasp.asp?filename = demo_checkboxlist
使用較少的行代碼可以獲得相同的結果。 我喜歡這種方式使用List,因為我不必處理尾隨分隔符。
var checkBoxes = new CheckBox[] {chkBend, chkDryDusty, chkHearing, ...}
var values = new string[] {"Bend/Stoop", "Dry/Dusty", "Hearing", ...}
var selectedEntries = new List<string>();
for(var i = 0; i < checkBoxes.Length; i++)
{
if (checkBoxes[i].Checked)
selectedEntries.Add(values[i]);
}
if (TextBox1.Text != "")
selectedEntries.Add(TextBox1.Text);
LblLimits.Text = string.Join(", ", selectedEntries.ToArray());
正如評論中提出的,我認為復選框是最佳解決方案。
如果您需要換行符:
LblLimits.Text = string.Join("<br/>", selectedEntries.ToArray());
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