在asp.net中使用javascript更改文本框颜色 [英] change the text box color with javascript in asp.net

问题描述

有人可以帮助我吗?验证为假时，如何使用javascript更改文本框颜色?例如，如果我检查null验证，则在文本框中未输入任何内容，它应在文本框中显示红色，表示您应在文本框中输入某些内容.

解决方案

//C#
TextBox1.BackColor = System.Drawing.Color.Red;
//Javascript<br />
document.getElementById("TextBox1").style.backgroundColor = "#FF0000";

如果有帮助，请 投票 和 接受答案 .

Can any one help me? How do I change the text box color with javascript when validation is false? For example, if I check for null validation then I enter nothing in the textbox, it should show the colour red in the textbox, indicating that you should enter something in the textbox.

解决方案

//C#
TextBox1.BackColor = System.Drawing.Color.Red;
//Javascript<br />
document.getElementById("TextBox1").style.backgroundColor = "#FF0000";

Please vote and Accept Answer if it Helped.

function btn_validate_click(events){
   if(document.getelementbyid("textbox1").text + "" = ""){
       lblValidation.Text = "Nothing has been entered.";
       document.getelementbyid("textbox1").ForeColor = "Red";
       document.getelementbyid("textbox1").BackColor = "Yellow"; // or whatever colours u want.
    }
}

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