如何从文本框中读取数据并显示到Gridview中，而不会覆盖Gridview中的现有行数据 [英] How to read the data from textboxes and display into the Gridview without overwritting the existing row data in Gridview

问题描述

  protected   void  btnGrid_Click（对象发​​件人，EventArgs e）
 {
  //  显示文本框数据到Gridview  
 dt =  new  DataTable（）; 
 dt.Columns.Add（  name）; 
 dt.Columns.Add（  age is）; 
  string  na = txtName.Text; 
  int  age = Convert.ToInt32（txtAge.Text）; 
 dt.Rows.Add（na，age）; 
 
 GridView1.DataSource = dt; 
 GridView1.DataBind（）; 
 
 
  //   DataRow dr1 = dt.NewRow（）;  
  //   dr1 [0] = txtName.Text;  
  //   dr1 [1] = txtAge.Text;  
  //   dt.Rows.Add（dr1）;  
  //   GridView1.DataSource = dt;  
  //   GridView1.DataBind（）;  
 
} 

解决方案

计算Gridview行，然后使用计算的行值添加值

，如下面的代码（C＃Windows应用程序代码）



string dates = textBox1.Text.ToString（）;

int i = dataGridView1.Rows.Count;

int j = i-1;

this.dataGridView1.Rows.Add（）;

dataGridView1.Rows [j] .Cells [0] .Value = dates;

textBox1.Text = ;

谢谢

公共部分类测试：System.Web.UI.Page

{

DataTable tb = new DataTable（）;



protected void Page_Load（object sender，EventArgs e）

{

if（！IsPostBack）

createtable（）;



}

protected void Button1_Click（object发件人，EventArgs e）

{



tb =（DataTable）ViewState [table1];

tb.Rows.Add（TextBox1.Text，tb.Rows.Count + 1）;

GridView1.DataSource = tb;

GridView1.DataBind（）;



}

public void createtable（）

{



tb.Columns.Add（Name，typeof（string））;

tb.Col umns.Add（Id，typeof（int））;

ViewState [table1] = tb;

}



}

public partial class test2：System.Web.UI.Page

{

静态DataTable table1 = new DataTable（）;



protected void Page_Load（object sender，EventArgs e）

{

< br $>
}

protected void Button1_Click（object sender，EventArgs e）

{

Int32 Rcount = table1.Rows。数;



if（Rcount == 0）

{

table1.Columns.Add（FName ）;

table1.Rows.Add（TextBox1.Text）;



}

else

{

DataRow dr = table1.NewRow（）;

dr [FName] = TextBox1.Text;

table1.Rows.Add（dr）;



}

GridView1.DataSource = table1;

GridView1.DataBind（）;

}

}

protected void btnGrid_Click(object sender, EventArgs e)
{
   //Displaying Textboxes data into Gridview
    dt = new DataTable();
    dt.Columns.Add("name");
    dt.Columns.Add("age is");
    string na = txtName.Text;
    int age = Convert.ToInt32(txtAge.Text);
    dt.Rows.Add(na, age);

    GridView1.DataSource = dt;
    GridView1.DataBind();


    //DataRow dr1 = dt.NewRow();
    //dr1[0] = txtName.Text;
    //dr1[1] = txtAge.Text;
    //dt.Rows.Add(dr1);
    //GridView1.DataSource = dt;
    //GridView1.DataBind();

}

解决方案

Hi,
Count the Gridview Rows and then Add the Values by using the counted Rows Values
like the Below code(it C# Windows Application Code)

string dates= textBox1.Text.ToString();
int i=dataGridView1.Rows.Count;
int j=i-1;
this.dataGridView1.Rows.Add();
dataGridView1.Rows[j].Cells[0].Value=dates;
textBox1.Text="";
Thanks

public partial class test : System.Web.UI.Page
{
DataTable tb = new DataTable();

protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
createtable();

}
protected void Button1_Click(object sender, EventArgs e)
{

tb = (DataTable)ViewState["table1"];
tb.Rows.Add(TextBox1.Text, tb.Rows.Count + 1);
GridView1.DataSource = tb;
GridView1.DataBind();

}
public void createtable()
{

tb.Columns.Add("Name", typeof(string));
tb.Columns.Add("Id", typeof(int));
ViewState["table1"] = tb;
}

}

public partial class test2 : System.Web.UI.Page
{
static DataTable table1 = new DataTable();

protected void Page_Load(object sender, EventArgs e)
{

}
protected void Button1_Click(object sender, EventArgs e)
{
Int32 Rcount =table1.Rows.Count;

if (Rcount == 0)
{
table1.Columns.Add("FName");
table1.Rows.Add(TextBox1.Text);

}
else
{
DataRow dr = table1.NewRow();
dr["FName"] = TextBox1.Text;
table1.Rows.Add(dr);

}
GridView1.DataSource = table1;
GridView1.DataBind();
}
}

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