如何从DropDownList中选择的值是里面的GridView [英] How to get selected value from DropDownList which is inside GridView

问题描述

我里面的GridView一个DropDownList。可以有的 N 的'行与具有不同值的一个DropDownList每一行的GridView号。我动态填充DropDownLists和所有的值在DropDownLists正确填充。

I have a DropDownList inside GridView. There can be 'n ' number of rows in a GridView with each row having a DropDownList with different values. I am populating DropDownLists dynamically and all the values are populated properly in DropDownLists.

当我改变的DropDownList的选定值的每一行和preSS按钮保存设置，我总是得到0指数，而不是我所选择的值的值。

When I change the selected value of DropDownList for each row and press the button to save these values, I always get the value of 0 index instead of the value that I have selected.

我发现了很多这样的问题，但没有人帮助我。什么是它不会从DropDownList的正确选择值的原因？任何想法？

I found lot of questions like this but none of them helps me. What's the reason it doesn't get the right selected value from DropDownList? Any ideas?

当我删除GridView的，只是使用的DropDownList然后正常工作。

When I remove the GridView and just use DropDownList then it works fine.

推荐答案

试试这个

<asp:TemplateField HeaderText="XYZ">
  <ItemTemplate>
    <asp:DropDownList runat="server" ID="MyDD" DataSourceId="MyDataSource" />
  </ItemTemplate> 
</asp:TemplateField>

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        string connectionString = WebConfigurationManager.ConnectionStrings[1].ConnectionString;
        SqlConnection con = new SqlConnection(connectionString);
        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            con.Open();
            var ddl = (DropDownList)e.Row.FindControl("ddlState");
            int CountryId = Convert.ToInt32(e.Row.Cells[0].Text);
            SqlCommand cmd = new SqlCommand("select * from State where CountryID = @CountryId", con);
            cmd.Parameters.Add("@CountryID", CountryId);
            SqlDataAdapter da = new SqlDataAdapter(cmd);
            DataSet ds = new DataSet();
            da.Fill(ds);
            con.Close();
            ddl.DataSource = ds;
            ddl.DataTextField = "StateName";
            ddl.DataValueField = "StateID";
            ddl.DataBind();
            ddl.Items.Insert(0, new ListItem("--Select--", "0"));
        }
    }

protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
 {

  DropDownList ddl= (DropDownList )GridView1.Rows[e.RowIndex].FindControl("ddlState");
  string selectedvalue=ddl.selectedvalue;
  //My custom code to change last moment values with that selected from DropDownList 
  e.NewValues.Add("State", selectedvalue);

 }

来源

这篇关于如何从DropDownList中选择的值是里面的GridView的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！