你可以拆分多行的值文本框，然后将每个部分添加为一行。

[更新]添加评论代码

 DataTable dt =  new  DataTable（）; 
 dt.Columns.Add（  ABCD， typeof （ string ））; 

 string  parts [] = textBox1.Split（ new   char  [] {'  \ r'，'  \ n'}，StringSplitOptions.RemoveEmptyEntries）; 
 foreach （ string  part  in 部分）
 {
 //  通过更新网格视图中的每一部分作为一行添加数据表 
 dt.Rows.Add（部分）; 
} 

我希望对你有所帮助。


请尝试解决方案

 <   asp：TextBox   
  
                                      ID   =  TextBox7    runat   =  server    AutoPostBack   =  true  
  
                                      OnTextChanged   =  TextBox7_TextChanged   高度  =  23px   宽度  =  151px    TextMode   =  MultiLine   >  <   / asp：TextBox  &GT; 跨度> 

hi,
I create one application in that gridview with one column name Testname and one multi line text box and submit button.

I want to add multi line textbox value in Gridview seprate rows.
suppose I type 2 line in multi line textbox
hi
hello

after click on submit button I want following output in gridview

Testname
hi
hello

want each line of textbox in each row of gridview

You can split the value of the multi-line textbox and then add each part as one row.
[UPDATE] Added code from comment

DataTable dt = new DataTable();
dt.Columns.Add("ABCD", typeof(string));

string parts[] = textBox1.Split(new char[] { '\r', '\n' }, StringSplitOptions.RemoveEmptyEntries);
foreach (string part in parts)
{
    // Add each part as a row in the gridview via updating the datatable
    dt.Rows.Add(part);
}

i hope its help for u

pls try to solution

<asp:TextBox

                  ID="TextBox7" runat="server" AutoPostBack="true"

                  OnTextChanged="TextBox7_TextChanged" Height="23px" Width="151px" TextMode="MultiLine" ></asp:TextBox>